98-21-21 R1: Electric Inflatable Door Seals
FAA order 98-21-21 R1 is an airworthiness directive in force since May 1, 2000. The FAA's subject line: Electric Inflatable Door Seals. It names Beechcraft 35 Bonanza and Debonair, Beechcraft 58 Baron, Beechcraft 95 Travel Air and Baron 55, Beechcraft A36 Bonanza, Beechcraft B36 Bonanza, Bellanca 17 Viking, Cessna 170, Cessna 172 Skyhawk, Cessna 175 Skylark, Cessna 180 Skywagon, Cessna 182 Skylane, Cessna 185 Skywagon, Cessna 206 Stationair, Cessna 210 Centurion, Cessna 310, Cessna 320, Cessna A185 Skywagon, Cessna P206 Super Skylane, Cessna P210 Pressurized Centurion, Cessna R182 Skylane RG, Cessna T-310, Cessna T210 Turbo Centurion, Cessna TP206, Cessna TR182 Turbo Skylane RG, Cessna TU206, Cessna U206 Stationair, Mooney M-20, Piper PA-23 Apache and Aztec, Piper PA-24 Comanche, Piper PA-28 Cherokee, Warrior, Archer and Arrow, Piper PA-30 Twin Comanche, Piper PA-31 Navajo and Chieftain, Piper PA-32 Cherokee Six, Lance and Saratoga, Piper PA-34 Seneca, Piper PA-39 Twin Comanche C/R, Piper PA-44 Seminole: about 90,536 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: airframe structure.
What it applies to as the FAA lists it
- Kind of product
- Appliance
- Makes
- Cessna Aircraft Company; Emerald Enterprises Ltd.; Mooney Aviation Company Inc; Piper Aircraft Inc.; Alexandria Aircraft LLC; Textron Aviation Inc.
- Models
- 17-30, 17-30A, 17-31, 17-31A, 17-31ATC, 17-31TC, 170, 170A, 170B, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 175, 175A, 175B, 175C, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 182P, 182Q, 185, 185A, 185B, 185C, 185D, 210, 210-5 (205), 210-5A (205A), 210A, 210B, 210C, 210D, 210E, 210F, 210G, 210H, 210J, 210K, 210L, 210M, 210N, 310, 310A, 310B, 310C, 310D, 310F, 310G, 310H, 310I, 310J, 310K, 310L, 310N, 310P, 310Q, 310R, 320,...
- On this site
- Beechcraft 35 Bonanza and Debonair 1,077 registered
Beechcraft 58 Baron 1,295 registered
Beechcraft 95 Travel Air and Baron 55 1,245 registered
Beechcraft A36 Bonanza 2,530 registered
Beechcraft B36 Bonanza 308 registered
Bellanca 17 Viking 628 registered
Cessna 170 2,084 registered
Cessna 172 Skyhawk 20,669 registered
Cessna 175 Skylark 927 registered
Cessna 180 Skywagon 2,606 registered
Cessna 182 Skylane 11,828 registered
Cessna 185 Skywagon 227 registered
Cessna 206 Stationair 213 registered
Cessna 210 Centurion 1,526 registered
Cessna 310 1,410 registered
Cessna 320 137 registered
Cessna A185 Skywagon 1,372 registered
Cessna P206 Super Skylane 163 registered
Cessna P210 Pressurized Centurion 443 registered
Cessna R182 Skylane RG 706 registered
Cessna T-310 207 registered
Cessna T210 Turbo Centurion 1,285 registered
Cessna TP206 25 registered
Cessna TR182 Turbo Skylane RG 465 registered
Cessna TU206 343 registered
Cessna U206 Stationair 798 registered
Mooney M-20 6,247 registered
Piper PA-23 Apache and Aztec 1,316 registered
Piper PA-24 Comanche 2,427 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,619 registered
Piper PA-30 Twin Comanche 879 registered
Piper PA-31 Navajo and Chieftain 935 registered
Piper PA-32 Cherokee Six, Lance and Saratoga 3,917 registered
Piper PA-34 Seneca 998 registered
Piper PA-39 Twin Comanche C/R 82 registered
Piper PA-44 Seminole 599 registered
Dates and paperwork
- In force since
- May 1, 2000
- Published
- March 9, 2000 (signed March 2, 2000)
- Docket
- 98-CE-88-AD
- Replaces
- 98-21-21
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The FAA's summary their words, unchanged
This amendment revises Airworthiness Directive (AD) 98-21-21, which currently requires de-activating the electric door seal inflation system for all aircraft equipped with Bob Fields Aerocessories inflatable door seals. Since issuance of that AD, the manufacturer has developed a modification that would allow these electric door seal inflation systems to remain in service, and the Federal Aviation Administration (FAA) has approved this modification. This AD requires incorporating this modification as a method of complying with the current AD, and will exclude those airplanes with manual door seal inflation systems from the AD requirements of de-activating the system. The actions specified by this AD are intended to prevent smoke and a possible fire in the cockpit caused by overheating of the electric door seal inflation systems, which could result in passenger injury.
The order itself the regulatory text, as published
Show the full text (9,076 characters)
Related safety bulletins advice on the same designs, not orders
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 5, 2026. Connections as data: /graph/directive/98-21-21 R1.json · aircraft systems.
