Pratt & Whitney JT8D series
82 aircraft on the U.S. register carry a Pratt & Whitney JT8D series engine, rated at about 7,700 pounds of thrust. The Mcdonnell Douglas DC-9 is the model most often fitted with it (63 aircraft). The aircraft carrying it were built between 1966 and 1999.
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 Pratt & Whitney JT8D series. FAA spelling: JT8D SERIES.
Fitted to model families
Mcdonnell Douglas DC-963Mcdonnell Douglas Aircraft Co MD-889Boeing 7274Mcdonnell Douglas Aircraft Co MD 833Mcdonnell Douglas Corporation MD-882Douglas DC-91
Mcdonnell Douglas DC-9 · Mcdonnell Douglas Aircraft Co MD-88 · Boeing 727 · Mcdonnell Douglas Aircraft Co MD 83 · Mcdonnell Douglas Corporation MD-88 · Douglas DC-9
Where they are owner's state
Texas26Alaska18Delaware16Florida7Michigan6Oregon3California2Wyoming1Utah1Oklahoma1
Kind of aircraft
Airliners and large jets82 (100%)
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Pratt & Whitney JT8D series the component layer
The design is held under 2 type certificates. The FAA has issued 69 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 3,031 failure reports with the FAA since 1995, 75 of them in the last ten years.
FAA orders 69 airworthiness directives · newest first
2021-12-282021-22-19 · Turbine Engine Compressor Section · engine
2011-04-282011-07-02 · Turbine Blade · engine
2011-03-222011-04-04 · Critical life-limited parts · engine
2011-03-042011-03-01 · Critical life- limited parts · engine
2010-11-122010-21-17 · Fan blade · engine
2010-04-2297-17-04 R1 · Front compressor front hub · engine
Failure reports 3,031 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Engine334Skin227Compressor74Frame63Fuel Control53Seat Track53Web47Wire43Blade38Light36
Latest reports
2022-03-22None: faulty
2022-03-22Computer: faulty
2021-01-31Gearbox: leaking
2020-10-22Bearing Seal: leaking
2019-12-21Engine: damaged
Certificates and bulletins
E2EAType certificate held by Pratt & Whitney · 16 models listed · revised August 28, 2007
E9NEType certificate held by Pratt & Whitney · 5 models listed · revised December 13, 2010
Safety bulletins 9 · advice, not orders
2016-09-02NE-16-22 · Turbine Engine Combustion Section JT8D Series Turbofan Engines
2010-05-07NE-10-32 · Turbine Engine Accessory Drive
2005-08-04NE-05-75R1 ·
2005-07-22NE-05-75 ·
2005-02-03NE-05-30 ·
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
Fitted to
- Mcdonnell Douglas DC-9 63 with this engine series
- Mcdonnell Douglas Aircraft Co MD-88 9 with this engine series
- Boeing 727 4 with this engine series
- Mcdonnell Douglas Aircraft Co MD 83 3 with this engine series
- Douglas DC-9 1 with this engine series
Where they are
Biggest operators
- Jetran LLC 26 of these aircraft
- Pac Blue Aerospace 9 of these aircraft
- Arctic One LLC 8 of these aircraft
- USA Jet Airlines INC 6 of these aircraft
- Frontera Flight Holdings INC 6 of these aircraft
Airworthiness
- FAA orders naming the Pratt & Whitney JT8D series 69 airworthiness directives
- Failure reports on the Pratt & Whitney JT8D series 3,031 reports since 1995
Analytics
These connections as data: /graph/engine/pratt-whitney-jt8d-series.json · about the eFlight graph.
Aircraft newest certificates first · 82
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N729CK | Boeing 727-264 |
Fixed-wing, multi-engine | Conair USA CO Dover, Delaware |
Standard | 2025-08-18 | ValidFAA registration status code V: Valid registration. All codes |
| N994DL | Mcdonnell Douglas Corporation MD-88 |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2025-03-27 | ValidFAA registration status code V: Valid registration. All codes |
| N287KB | Mcdonnell Douglas DC-9-87 |
Fixed-wing, multi-engine | Csds Asset Management LLC Marana, Arizona |
Standard | 2025-03-06 | ValidFAA registration status code V: Valid registration. All codes |
| N908JE | Boeing 727-31 |
Fixed-wing, multi-engine | Jet Assets INC Cheyenne, Wyoming |
Standard | 2024-09-17 | ValidFAA registration status code V: Valid registration. All codes |
| N9628W | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N962TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N9630A | Mcdonnell Douglas Aircraft Co MD 83 |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N969TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N970TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N972TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N979TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N980TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N982TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N983TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N9615W | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9616G | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9617R | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9618A | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9619V | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N961TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9620D | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9622A | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9624T | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9625W | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9626F | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N963TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N964TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N965TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N967TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N968TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Jetran LLC Horseshoe Bay, Texas |
Standard | 2023-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N966CE | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2023-05-26 | ValidFAA registration status code V: Valid registration. All codes |
| N997DL | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | Tatonduk Outfitters LTD Fairbanks, Alaska |
Standard | 2023-02-24 | ValidFAA registration status code V: Valid registration. All codes |
| N590AA | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Frontera Flight Holdings INC Dover, Delaware |
Standard | 2022-11-11 | ValidFAA registration status code V: Valid registration. All codes |
| N572AA | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | 727X Aerospace CORP Lewes, Delaware |
Standard | 2022-09-06 | ValidFAA registration status code V: Valid registration. All codes |
| N7541A | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Frontera Flight Holdings INC Dover, Delaware |
Standard | 2022-09-03 | ValidFAA registration status code V: Valid registration. All codes |
| N7548A | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Frontera Flight Holdings INC Dover, Delaware |
Standard | 2022-09-03 | ValidFAA registration status code V: Valid registration. All codes |
| N7550 | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Frontera Flight Holdings INC Dover, Delaware |
Standard | 2022-09-03 | ValidFAA registration status code V: Valid registration. All codes |
| N976TW | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Bank of Utah Trustee Salt Lake City, Utah |
Standard | 2022-08-24 | ValidFAA registration status code V: Valid registration. All codes |
| N913DE | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | Corsair Two LLC Hillsboro, Oregon |
Standard | 2022-05-28 | ValidFAA registration status code V: Valid registration. All codes |
| N990DL | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | Corsair Two LLC Hillsboro, Oregon |
Standard | 2022-05-28 | ValidFAA registration status code V: Valid registration. All codes |
| N576AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Fronteraflight Holdings INC Dover, Delaware |
Standard | 2021-12-01 | ValidFAA registration status code V: Valid registration. All codes |
| N9409F | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Fronteraflight Holdings INC Dover, Delaware |
Standard | 2021-12-01 | ValidFAA registration status code V: Valid registration. All codes |
| N586AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Aerothrust Holdings Leasing LLC Miami, Florida |
Standard | 2021-11-18 | ValidFAA registration status code V: Valid registration. All codes |
| N7520A | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Aerothrust Holdings Leasing LLC Miami, Florida |
Standard | 2021-11-17 | ValidFAA registration status code V: Valid registration. All codes |
| N861GA | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | World Atlantic Leasing LLC Miami Springs, Florida |
Standard | 2021-08-24 | ValidFAA registration status code V: Valid registration. All codes |
| N842US | Mcdonnell Douglas Corporation MD-88 |
Fixed-wing, multi-engine | USA Jet Airlines INC Belleville, Michigan |
Standard | 2021-07-09 | ValidFAA registration status code V: Valid registration. All codes |
| N837US | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | USA Jet Airlines INC Belleville, Michigan |
Standard | 2021-06-11 | ValidFAA registration status code V: Valid registration. All codes |
| N836US | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | USA Jet Airlines INC Belleville, Michigan |
Standard | 2021-06-04 | ValidFAA registration status code V: Valid registration. All codes |
| N111RE | Mcdonnell Douglas DC-9-87 |
Fixed-wing, multi-engine | X Aviation Group LLC Beverly Hills, California |
Standard | 2021-06-03 | ValidFAA registration status code V: Valid registration. All codes |
| N835US | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | USA Jet Airlines INC Belleville, Michigan |
Standard | 2021-05-17 | ValidFAA registration status code V: Valid registration. All codes |
| N834US | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | USA Jet Airlines INC Belleville, Michigan |
Standard | 2021-05-10 | ValidFAA registration status code V: Valid registration. All codes |
| N833US | Mcdonnell Douglas Aircraft Co MD-88 |
Fixed-wing, multi-engine | USA Jet Airlines INC Belleville, Michigan |
Standard | 2021-04-29 | ValidFAA registration status code V: Valid registration. All codes |
| N801WA | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Caribbean Sun Airlines INC DBA Miami, Florida |
Standard | 2021-01-29 | ValidFAA registration status code V: Valid registration. All codes |
| N553AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Frontera Flight Holdings INC Dover, Delaware |
Standard | 2020-04-09 | ValidFAA registration status code V: Valid registration. All codes |
| N909PG | Boeing 727-2K5 |
Fixed-wing, multi-engine | Argenjet Air Lease INC Miami, Florida |
Standard | 2020-03-27 | Reports overdueFAA registration status code N: Non-citizen corporation that has not returned its flight-hour reports. All codes |
| N807TR | Mcdonnell Douglas Aircraft Co MD 83 |
Fixed-wing, multi-engine | Caribbean Sun Airlines INC Miami Springs, Florida |
Standard | 2019-09-05 | ValidFAA registration status code V: Valid registration. All codes |
| N557AN | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N558AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N560AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N561AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N573AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N574AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N583AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N585AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N595AA | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Pac Blue Aerospace Fairbanks, Alaska |
Standard | 2019-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N581AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Frontera Flight Holding INC Dover, Delaware |
Standard | 2019-01-14 | ValidFAA registration status code V: Valid registration. All codes |
| N566AA | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Frontera Flight Holding INC Dover, Delaware |
Standard | 2019-01-02 | ValidFAA registration status code V: Valid registration. All codes |
| N483A | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2018-12-19 | ValidFAA registration status code V: Valid registration. All codes |
| N556AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Frontera Flight Holding INC Dover, Delaware |
Standard | 2018-11-17 | ValidFAA registration status code V: Valid registration. All codes |
| N482AA | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2018-11-06 | ValidFAA registration status code V: Valid registration. All codes |
| N127NK | Douglas DC-9-21 |
Fixed-wing, multi-engine | Perris Valley Airport INC Perris, California |
Standard | 2018-09-18 | ValidFAA registration status code V: Valid registration. All codes |
| N44503 | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Frontera Flight Holdings INC Dover, Delaware |
Standard | 2018-08-27 | ValidFAA registration status code V: Valid registration. All codes |
| N962CE | Mcdonnell Douglas Aircraft Co MD 83 |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2018-04-13 | ValidFAA registration status code V: Valid registration. All codes |
| N950NS | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Corsair Two LLC Hillsboro, Oregon |
Standard | 2015-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N965CE | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2014-09-23 | ValidFAA registration status code V: Valid registration. All codes |
| N806WA | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | 53251 LLC Miami Springs, Florida |
Standard | 2013-09-13 | ValidFAA registration status code V: Valid registration. All codes |
| N964CE | Mcdonnell Douglas DC-9-83(MD-83) |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2013-07-05 | ValidFAA registration status code V: Valid registration. All codes |
| N961CE | Mcdonnell Douglas DC-9-82(MD-82) |
Fixed-wing, multi-engine | Arctic One LLC Fairbanks, Alaska |
Standard | 2013-03-04 | ValidFAA registration status code V: Valid registration. All codes |
| N216WE | Boeing 727-2S2F |
Fixed-wing, multi-engine | International Trading Company of Yukon INC Oklahoma City, Oklahoma |
Standard | 2011-11-21 | ValidFAA registration status code V: Valid registration. All codes |
| N782TW | Mcdonnell Douglas DC-9-15F |
Fixed-wing, multi-engine | Sierra American CORP Wilmington, Delaware |
Standard | 2011-04-13 | ValidFAA registration status code V: Valid registration. All codes |
| N783TW | Mcdonnell Douglas DC-9-15F |
Fixed-wing, multi-engine | Sierra American CORP Wilmington, Delaware |
Standard | 2005-02-01 | ValidFAA registration status code V: Valid registration. All codes |
| N784TW | Mcdonnell Douglas DC-9-15F |
Fixed-wing, multi-engine | Sierra American CORP Wilmington, Delaware |
Standard | 2005-02-01 | 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 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.