90-17-01: Carburetor Air Box Latches
FAA order 90-17-01 is an airworthiness directive in force since September 10, 1990. The FAA's subject line: Carburetor Air Box Latches. It names Robinson R22: about 817 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Robinson Helicopter Company
- Models
- R22, R22 ALPHA, R22 BETA, R22 MARINER
- On this site
- Robinson R22 817 registered
Dates and paperwork
- In force since
- September 10, 1990
- Docket
- 89-ASW-58
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (2,042 characters)
90-17-01 ROBINSON HELICOPTER COMPANY (RHC): Amendment 39-6687. Docket No. 89-ASW-58.\n\n\tApplicability: All Model R22 series helicopters, certified in any category, equipped with carburetor air box latches. \n\n\tCompliance: Required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished. \n\n\tTo prevent carburetor air box latches from coming loose in flight, which could result in power loss in critical maneuvers close to the ground, accomplish the following: \n\n\t(a)\tRemove the three carburetor air box latches and replace with four bolts in accordance with the following: \n\n\t\t(1)\tOpen the air box and remove the filter element. \n\n\t\t(2)\tRemove the air box from the helicopter. \n\n\t\t(3)\tDrill out the four rivets in the cover holding 0.25 inch diameter spacers and enlarge the holes to 0.191 inch diameter. Discard the spacers. \n\n\t\t(4)\tClose the cover, and using the holes in the cover as guides, drill four matching holes through the upper box in line with the holes in the cover. \n\n\t\t(5)\tOpen the air box and drill out all the rivets holding the latches to the cover. Discard the latches and angles. Clean the drilling chips from the box. \n\n\t\t(6)\tReinstall the air box to the helicopter. \n\n\t\t(7)\tInstall the filter element and secure the cover using four AN3-35A bolts, AN960-10L washers, AN970-3 washers, and NAS679A3 nuts. \n\n\tNOTE: Refer to Figure 1 for accomplishing the instructions required by paragraph (a). \n\n\t(b)\tAn alternate method of compliance or adjustment of the compliance time, which provides an equivalent level of safety, may be used if approved by the Manager, Los Angeles Aircraft Certification Office, ANM-100L, FAA, Northwest Mountain Region, 3229 E. Spring Street, Long Beach, California 90806-2425. \n\n\tNOTE: Robinson Helicopter Company Service Bulletin Number 61, dated July 28, 1989, pertains to this AD. \n\n\tThis amendment (39-6687, AD 90-17-01) becomes effective on September 10, 1990. \n\nSB 61
Related safety bulletins advice on the same designs, not orders
2023-02-142023-01 · MAIN ROTOR BLADES; Brinelled Main Rotor Blade Spindle Bearing
2022-04-11AIR-22-08 · MAIN ROTOR DRIVE SYSTEM,TAIL ROTOR DRIVE SYSTEM
2022-03-03AIR-22-03 · Robinson Helicopter Company Model R22, R44, and R66 Helicopters; Emergency Locator Transmitter Retention
2012-10-03SW-12-45 · Garmin Model 400W/500W Series GPS-WAAS Navigation System
2011-01-06SW-11-15 · Carbon Monoxide Detectors
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 30, 2026. Connections as data: /graph/directive/90-17-01.json · aircraft systems.