Lycoming O-320 series
27,315 aircraft on the U.S. register carry a Lycoming O-320 series engine, rated at about 180 horsepower. The Cessna 172 Skyhawk is the model most often fitted with it (9,462 aircraft). The aircraft carrying it were built between 1949 and 2026.
The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Lycoming O-320 series (2 codes). FAA spellings: 0-320 SERIES · O-320 SERIES.
Fitted to model families
Model families, as a table
Cessna 172 Skyhawk · Piper PA-28 Cherokee, Warrior, Archer and Arrow · Piper PA-18 Super Cub · Piper PA-22 Tri-Pacer and Colt · Grumman American Avn. Corp. AA-5 Traveler, Cheetah and Tiger · Bellanca 7 Citabria · Cessna 177 Cardinal · Piper PA-23 Apache and Aztec · Robinson R22 · Champion 7 Citabria and Champ
Where they are owner's state
Kind of aircraft
By kind, as a table
| aircraft | share | |
|---|---|---|
| Piston singles | 26,597 | 97% |
| Piston twins | 414 | 2% |
| Helicopters | 303 | 1% |
| Gliders | 1 | 0.0% |
What the FAA has certified, ordered and been told about the Lycoming O-320 series the component layer
The design is held under 1 type certificate (E-274, held by Lycoming Engines). The FAA has issued 29 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 349 failure reports with the FAA since 1995, 19 of them in the last ten years.
FAA orders 29 airworthiness directives · newest first
Failure reports 349 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 95 | 2 |
| 96 | 1 |
| 97 | 2 |
| 98 | 6 |
| 00 | 7 |
| 01 | 39 |
| 02 | 24 |
| 03 | 39 |
| 04 | 30 |
| 05 | 41 |
| 06 | 23 |
| 07 | 32 |
| 08 | 18 |
| 09 | 15 |
| 10 | 13 |
| 11 | 7 |
| 12 | 10 |
| 13 | 4 |
| 14 | 6 |
| 15 | 2 |
| 16 | 9 |
| 17 | 1 |
| 18 | 6 |
| 19 | 1 |
| 20 | 3 |
| 21 | 1 |
| 23 | 2 |
| 25 | 1 |
| 26 | 4 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Spar | 18 |
| Tube | 17 |
| Cylinder | 15 |
| Bulkhead | 9 |
| Alternator | 8 |
| Control Cable | 8 |
| Bolt | 7 |
| Carburetor | 7 |
| Fitting | 6 |
| Float | 6 |
Latest reports
Certificates and bulletins
Safety bulletins 17 · advice, not orders
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how this engine series links to the rest of the register
- Cessna 172 Skyhawk 9,462 with this engine series
- Piper PA-28 Cherokee, Warrior, Archer and Arrow 6,844 with this engine series
- Piper PA-18 Super Cub 2,393 with this engine series
- Piper PA-22 Tri-Pacer and Colt 1,660 with this engine series
- Grumman American Avn. Corp. AA-5 Traveler, Cheetah and Tiger 566 with this engine series
- Bellanca 7 Citabria 563 with this engine series
- Cessna 177 Cardinal 398 with this engine series
- Piper PA-23 Apache and Aztec 347 with this engine series
- Texas 2,351 of these aircraft
- California 2,123 of these aircraft
- Florida 2,077 of these aircraft
- Alaska 1,796 of these aircraft
- Washington 1,004 of these aircraft
- Wings Over Texas Holdings LLC 107 of these aircraft
- American Patrols INC 61 of these aircraft
- Paris Air INC 33 of these aircraft
- Civil Air Patrol INC 33 of these aircraft
- International Air Services INC Trustee 30 of these aircraft
- FAA orders naming the Lycoming O-320 series 29 airworthiness directives
- Failure reports on the Lycoming O-320 series 349 reports since 1995
The whole map of how records connect · these connections as data: /graph/engine/lycoming-o-320-series.json.
Aircraft newest certificates first · 27,315
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N2891T | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner Florida |
Standard | 2021-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N35456 | Cessna 172I |
Fixed-wing, single engine | Wing Dock LLC Miami, Oklahoma |
Standard | 2021-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N3604K | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner Ohio |
Standard | 2021-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N4217P | Piper PA-23-160 |
Fixed-wing, multi-engine | International Air Services INC Trustee Carson City, Nevada |
Standard | 2021-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N64345 | Cessna 172M |
Fixed-wing, single engine | Co-owned owner California |
Standard | 2021-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N987BB | Voshell Frank RV-4 |
Fixed-wing, single engine | Time Building LLC Lake Oswego, Oregon |
Experimental | 2021-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N22429 | Cessna 172M |
Fixed-wing, single engine | Individual owner Washington |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N41700 | Bellanca 7GCBC |
Fixed-wing, single engine | Individual owner Arizona |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N4665R | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner Wisconsin |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N5861U | Piper PA-28-140 |
Fixed-wing, single engine | Lasc Aviation INC Callaway, Florida |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N7371L | American AA-5 |
Fixed-wing, single engine | Individual owner Arizona |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N912J | Piper PA-28-161 |
Fixed-wing, single engine | Individual owner Washington |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N9688S | Champion 7GCAA |
Fixed-wing, single engine | Individual owner Texas |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N9867J | Cessna 172N |
Fixed-wing, single engine | Norby Aviation LLC Hopkinton, Massachusetts |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N1433X | Piper PA-28-151 |
Fixed-wing, single engine | Echota Flyers INC Calhoun, Georgia |
Standard | 2021-03-29 | ValidFAA registration status code V: Valid registration. All codes |
| N1947F | Cessna 172N |
Fixed-wing, single engine | Melbourne Flight Training LLC Melbourne, Florida |
Standard | 2021-03-27 | ValidFAA registration status code V: Valid registration. All codes |
| N2931X | Cessna 177 |
Fixed-wing, single engine | Withheld at owner's request | Standard | 2021-03-27 | ValidFAA registration status code V: Valid registration. All codes |
| N44076 | Piper PA-28-151 |
Fixed-wing, single engine | Co-owned owner Michigan |
Standard | 2021-03-25 | ValidFAA registration status code V: Valid registration. All codes |
| N6553R | Beech B19 |
Fixed-wing, single engine | Individual owner California |
Standard | 2021-03-24 | ValidFAA registration status code V: Valid registration. All codes |
| N95111 | Piper PA-28-140 |
Fixed-wing, single engine | Tiny Tin Aviation LLC Groveland, Florida |
Standard | 2021-03-24 | ValidFAA registration status code V: Valid registration. All codes |
| N6223J | Piper PA-28-140 |
Fixed-wing, single engine | Vanderstoel Alex T Waterford, California |
Standard | 2021-03-23 | ValidFAA registration status code V: Valid registration. All codes |
| N6429W | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner Virginia |
Standard | 2021-03-23 | ValidFAA registration status code V: Valid registration. All codes |
| N6604E | Cessna 172N |
Fixed-wing, single engine | Flyn High Aviation LLC Boynton Beach, Florida |
Standard | 2021-03-23 | ValidFAA registration status code V: Valid registration. All codes |
| N780GA | Grumman American Avn. Corp. GA-7 |
Fixed-wing, multi-engine | Prairie Planes LLC Mitchell, South Dakota |
Standard | 2021-03-23 | ValidFAA registration status code V: Valid registration. All codes |
| N9368D | Piper PA-18A 150 |
Fixed-wing, single engine | Individual owner Alaska |
Standard | 2021-03-23 | ValidFAA registration status code V: Valid registration. All codes |
| N7259F | Piper PA-28-151 |
Fixed-wing, single engine | Learn 2 Fly Ct LLC Simsbury, Connecticut |
Standard | 2021-03-22 | ValidFAA registration status code V: Valid registration. All codes |
| N75598 | Cessna 172N |
Fixed-wing, single engine | Columbia Jet Center INC Columbia, Missouri |
Standard | 2021-03-22 | ValidFAA registration status code V: Valid registration. All codes |
| N160TX | Grumman American Avn. Corp. AA-5A |
Fixed-wing, single engine | Individual owner California |
Standard | 2021-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N7231Q | Cessna 172L |
Fixed-wing, single engine | Dsr-Cherokee 180 LLC Dallas, Texas |
Standard | 2021-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N84456 | Cessna 172K |
Fixed-wing, single engine | Warbirds East INC Fairhope, Alabama |
Standard | 2021-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N102KC | Pederson Gill A RV-3A |
Fixed-wing, single engine | Co-owned owner Texas |
Experimental | 2021-03-19 | ValidFAA registration status code V: Valid registration. All codes |
| N1189C | Piper PA-18A |
Fixed-wing, single engine | Individual owner Alaska |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N2351Y | Cessna 177 |
Fixed-wing, single engine | Toes In the Sand LLC Bentonville, Arkansas |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N26855 | Gulfstream American Corp AA-5A |
Fixed-wing, single engine | Co-owned owner Arizona |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N4200Y | Bellanca 7GCBC |
Fixed-wing, single engine | Texas Red Bird LLC Palo Pinto, Texas |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N57361 | Piper PA-28-151 |
Fixed-wing, single engine | Individual owner Arizona |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N7015G | Cessna 172K |
Fixed-wing, single engine | Individual owner New York |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N7072Q | Cessna 172L |
Fixed-wing, single engine | B&R Aircraft LLC Wadsworth, Ohio |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N7211J | Piper PA-28-140 |
Fixed-wing, single engine | Golden Arrow Transportation Plainfield, New Jersey |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N733QG | Cessna 172N |
Fixed-wing, single engine | Carter Flygare INC Sacramento, California |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9019Q | Piper PA-28-151 |
Fixed-wing, single engine | Syrasoft Aviation LLC Baldwinsville, New York |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9537S | Champion 7GCAA |
Fixed-wing, single engine | Individual owner Georgia |
Standard | 2021-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N12038 | Hasenbalg Russel TAILWIND W-10 |
Fixed-wing, single engine | Individual owner Texas |
Experimental | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N20666 | Cessna 172M |
Fixed-wing, single engine | 20666 Aircraft Leasing LLC Spanish Fork, Utah |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N2158A | Piper PA-18-135 |
Fixed-wing, single engine | Individual owner Alaska |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N26962 | Gulfstream American Corp AA-5A |
Fixed-wing, single engine | Individual owner Washington |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N4376Q | Cessna 172L |
Fixed-wing, single engine | Individual owner Colorado |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N47657 | Cessna 172N |
Fixed-wing, single engine | Co-owned owner California |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N53719 | Bellanca 7GCBC |
Fixed-wing, single engine | Individual owner Nevada |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N6110W | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner Tennessee |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N6938D | Piper PA-22-150 |
Fixed-wing, single engine | Individual owner West Virginia |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N83580 | Piper PA-18-150 |
Fixed-wing, single engine | Lazy Ye Cattle CO Dodson, Montana |
Standard | 2021-03-17 | ValidFAA registration status code V: Valid registration. All codes |
| N102AS | Grumman American Avn. Corp. AA-5A |
Fixed-wing, single engine | G&P Cheetah LLC Honolulu, Hawaii |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N26917 | Gulfstream American Corp AA-5A |
Fixed-wing, single engine | Co-owned owner Arizona |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N29TL | Piper PA-28-151 |
Fixed-wing, single engine | Tml Aircraft INC Narrowsburg, New York |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N356ND | Piper PA-28-161 |
Fixed-wing, single engine | Air Shares LLC Casper, Wyoming |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N51297 | Cessna 172M |
Fixed-wing, single engine | Individual owner Oregon |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N5886D | Piper PA-18-150 |
Fixed-wing, single engine | AG Solutions of West Texas LLC Roby, Texas |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N6523D | Cessna 172N |
Fixed-wing, single engine | Air Shares LLC Casper, Wyoming |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N7292X | Cessna 150B |
Fixed-wing, single engine | Individual owner Washington |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N288GH | Piper PA-28-150 |
Fixed-wing, single engine | Co-owned owner Louisiana |
Standard | 2021-03-15 | ValidFAA registration status code V: Valid registration. All codes |
| N3239E | Cessna 172N |
Fixed-wing, single engine | Leaf Air LLC Queensbury, New York |
Standard | 2021-03-15 | ValidFAA registration status code V: Valid registration. All codes |
| N733NC | Cessna 172N |
Fixed-wing, single engine | Rrgsoftware LLC Alpine, California |
Standard | 2021-03-15 | ValidFAA registration status code V: Valid registration. All codes |
| N734VN | Cessna 172N |
Fixed-wing, single engine | Kcsi Aerial Patrol INC Bakersfield, California |
Standard | 2021-03-15 | ValidFAA registration status code V: Valid registration. All codes |
| N737LH | Cessna 172N |
Fixed-wing, single engine | Centerline Aviation LLC Fredericksburg, Virginia |
Standard | 2021-03-15 | ValidFAA registration status code V: Valid registration. All codes |
| N901HR | American Champion Aircraft 7GCBC |
Fixed-wing, single engine | Kcsi Aerial Patrol INC Bakersfield, California |
Standard | 2021-03-15 | ValidFAA registration status code V: Valid registration. All codes |
| N95211 | Piper PA-28-140 |
Fixed-wing, single engine | Massey Aviation LLC Ashburn, Georgia |
Standard | 2021-03-15 | ValidFAA registration status code V: Valid registration. All codes |
| N1488U | Cessna 172M |
Fixed-wing, single engine | Individual owner Wisconsin |
Standard | 2021-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N20398 | Cessna 172M |
Fixed-wing, single engine | Individual owner Utah |
Standard | 2021-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N22VB | Beltram Victor R GLASAIR-TD |
Fixed-wing, single engine | Individual owner Kentucky |
Experimental | 2021-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N23291 | Cessna 172M |
Fixed-wing, single engine | Oracle Aviation LLC Omaha, Nebraska |
Standard | 2021-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N4083E | Piper PA-18-150 |
Fixed-wing, single engine | Individual owner Alaska |
Standard | 2021-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N4301Q | Cessna 172L |
Fixed-wing, single engine | Individual owner Michigan |
Standard | 2021-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N94DB | Blanton David L ACRO SPORT II |
Fixed-wing, single engine | Individual owner New Jersey |
Experimental | 2021-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N11657 | Bellanca 7GCBC |
Fixed-wing, single engine | Co-owned owner Indiana |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N3352Z | Piper PA-22-150 |
Fixed-wing, single engine | Individual owner California |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N5426F | Piper PA-28-151 |
Fixed-wing, single engine | Pressley Aviation LLC New London, North Carolina |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N61607 | Cessna 172M |
Fixed-wing, single engine | Co-owned owner South Dakota |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N64270 | Cessna 172M |
Fixed-wing, single engine | Sundance Aviation INC Richland, Washington |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N7561K | Piper PA-18 |
Fixed-wing, single engine | Co-owned owner Alaska |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N96836 | Cessna 172P |
Fixed-wing, single engine | Visalia Flyers LLC Visalia, California |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N9837L | Cessna 172P |
Fixed-wing, single engine | Ial CORP Wilmington, Delaware |
Standard | 2021-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N20431 | Cessna 172M |
Fixed-wing, single engine | Organization of Black Aerospace Professionals Westchester, Illinois |
Standard | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N20DK | Cessna 172M |
Fixed-wing, single engine | Flight Surgeon LLC Fayetteville, Arkansas |
Standard | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N318FC | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner Hawaii |
Standard | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N3992P | Piper PA-18A 150 |
Fixed-wing, single engine | Air Bear Aviation INC North Hampton, New Hampshire |
Standard | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N42035 | Cessna 172M |
Fixed-wing, single engine | Individual owner Georgia |
Standard | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N78DF | Frazier Donald E THORP T-18 |
Fixed-wing, single engine | Individual owner Texas |
Experimental | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N8619E | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner North Carolina |
Standard | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N9639W | Piper PA-28-140 |
Fixed-wing, single engine | Individual owner South Dakota |
Standard | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N9944D | Piper PA-18A |
Fixed-wing, single engine | Red Baron LLC Dickinson, North Dakota |
Multiple | 2021-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N13MR | Robbins Wesley M RV-4 |
Fixed-wing, single engine | Individual owner Kansas |
Experimental | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N1895K | Maule MX-7-160 |
Fixed-wing, single engine | Co-owned owner Florida |
Standard | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N2081C | Piper PA-28-161 |
Fixed-wing, single engine | Trident Aircraft INC Easton, Maryland |
Standard | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N40558 | Piper PA-18-150 |
Fixed-wing, single engine | Individual owner Alaska |
Standard | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N4252Z | Piper PA-18-150 |
Fixed-wing, single engine | Co-owned owner California |
Multiple | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N45CL | Littleton David A TWINSTAR |
Fixed-wing, single engine | Individual owner Indiana |
Experimental | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N47899 | Piper PA-28-161 |
Fixed-wing, single engine | Nationwide Aviation LLC Hudson Oaks, Texas |
Standard | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N5429L | Grumman American Avn. Corp. AA-5 |
Fixed-wing, single engine | Gardner T Larry Dickson, Tennessee |
Standard | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N9163Z | Piper PA-28-161 |
Fixed-wing, single engine | Trident Aircraft INC Easton, Maryland |
Standard | 2021-03-10 | ValidFAA registration status code V: Valid registration. All codes |
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.
