# AD 98-21-21 R1: Electric Inflatable Door Seals

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 17-30, 17-30A, 17-31, 17-31A, 17-31ATC, 17-31TC, 170, 170A, 170B, 172A, 172B, 172C and 258 more
- Effective: May 1, 2000
- Published: March 9, 2000
- Issued: March 2, 2000
- Supersedes: [AD 98-21-21](https://openairdocs.org/ad/98-21-21)
- Superseded by: Nothing supersedes this AD
- Product type: Appliance
- Amendment: 39-11621
- Docket: 98-CE-88-AD
- Registered aircraft: 85,632 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D140D1B5B0D327DC86256A0A006E2297.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/98-21-21-R1

## Summary

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 airworthiness directive

REVISION

98-21-21 R1 BOB FIELDS AEROCESSORIES: Amendment 39-11621; Docket No. 98-CE-88-AD; Revises AD 98-21-21, Amendment 39-10844.

Applicability: Electric inflatable door seals, installed either in accordance with the applicable supplemental type certificate (STC) or through field approval, that are installed on, but not limited to, the following aircraft:

Affected STC Make and Model Aircraft Affected SA3735NM Cessna Models 170, 170A, and 170B Airplanes SA4136WE Cessna Models 310, 310A, 310B, 310C, 310D, 310F, 310G, 310H, 310I, 310J, 310K, 310L, 310N, 310P, 310Q, 310R, T310P, T310Q, and T310R Airplanes SA2226NM Cessna Models P210N and P210R Airplanes SA3736NM Cessna Models 185, 185A, 185B, 185C, 185D, A185E, and A185F Airplanes SA4177WE Cessna Models 175, 175A, 175B, and 175C Airplanes SA4212WE Cessna Models 210, 210A, 210B, 210C, 210D, 210E, 210F, 210G, 210H, 210J, 210K, 210L, 210M, 210N, T210F, T210G, T210H, T210J, T210K, T210L, T210M, T210N, 210-5 (205), and 210-5A (205A) Airplanes SA4283WE Cessna Models 172, 172A, 172B, 172C, 172D, 172E, 172F, 172G, 172H, 172I, 172K, 172L, 172M, and 172N Airplanes SA4284WE Cessna Models 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, and 180K Airplanes SA4285WE Cessna Models 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 182P, 182Q, R182, and TR182 Airplanes SA4286WE Cessna Models 206, P206, P206A, P206B, P206C, P206D, P206E, TP206A, TP206B, TP206C, TP206D, TP206E, U206, U206A, U206B, U206C, U206D, U206E, U206F, U206G, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F, and TU206G Airplanes SA4287WE Cessna Models 320, 320A, 320B, 320C, 320D, 320E, 320F, and 320-1 Airplanes SA4180WE Raytheon (Beech) Models H35, J35, K35, M35, N35, P35, S35, V35, V35A, V35B, 35-33, 35-A33, 35-B33, 35-C33, 35-C33A, E33, E33A, E33C, F33, F33A, F33C, G33, 36, A36, A36TC, and B36TC Airplanes SA4184WE Raytheon (Beech) Models 95, B95, B95A, E95, 95-55, 95-A55, 95-B55, 95-B55A, 95-B55B, 95-C55, D55, E55, 56TC, 58, and 58A Airplanes SA4239WE Raytheon (Beech) Models 58P, 58PA, 58TC, and 58TCA Airplanes SA4240WE Raytheon (Beech) Models 50, B50, C50, D50, D50A, D50B, D50C, D50E, D50E-5990, E50, F50, G50, H50, and J50 Airplanes SA4282WE Raytheon (Beech) Models 35, A35, B35, C35, D35, E35, F35, G35, and 35R Airplanes SA4178WE Mooney Models M20, M20A, M20C, M20D, M20E, M20F, M20G, M20J, and M20K Airplanes SA4234WE The New Piper Aircraft, Inc. (Piper) Models PA-34-200, PA-34-200T, and PA-34-220T Airplanes SA4179WE Piper Models PA-24, PA-24-250, PA-24-260, and PA-24-400 Airplanes SA4235WE Piper Models PA-44-180 and PA-44-180T Airplanes SA4236WE Piper Models PA-28-140, PA-28-150, PA-28-160, PA-28-180, PA-28-235, PA-28-151, PA-28-181, PA-28-161, PA-28-236, PA-28-201T, PA-28S-160, PA-28S-180, PA-28R-180, PA-28R-200, PA-28R-201, PA-28R-201T, PA-28RT-201, and PA-28RT-201T Airplanes SA4237WE Piper Models PA-23, PA-23-160, PA-23-235, PA-23-250,and PA-E23-250 Airplanes SA4238WE Piper Models PA-30, PA-39, and PA-40 Airplanes SA4385WP Piper Models PA-31, PA-31-300, PA-31-325, and PA-31-350 Airplanes SA4288WE Piper Models PA-32-260, PA-32-300, PA-32S-300, PA-32-301, PA-32-301T, PA-32R-300, PA-32R-301, PA-32R-301T, PA-32RT-300, and PA-32RT-300T Airplanes SA2511NM Bellanca Models 17-30, 17-31, and 17-31TC Airplanes SA2510NM Bellanca Models 17-30A, 17-31A, and 17-31ATC Airplanes SA4316WE Wing Aircraft Company Model D-1 Airplanes

NOTE 1: This AD applies to each airplane identified in the preceding applicability provision that has the affected inflatable door seals installed, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance withparagraph (f) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance: Required as indicated in the body of this AD, unless already accomplished.

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, accomplish the following:

  (a) Prior to further flight after October 30, 1998 (the effective date of AD 98-21-21), deactivate the electric door seal inflation system by accomplishing the following:

  (1) Disconnect the battery.

  (2) Locate the air pump and identify the power wire to the air pump.

  (3) Trace the power wire to its connection to the airplane's original electrical power system. Disconnect the power wire at its attachment to the airplane's electrical power system and stow the wire end.

  (4) For non-pressurized airplanes, fabricate a placard that incorporates the following words utilizing letters that are at least 0.10-inch in height, and install this placard on the instrument panel within the pilot's clear view:

"ELECTRIC DOOR SEAL INFLATION SYSTEM INOPERATIVE"

  (5) For pressurized airplanes or for airplanes that do not have an operating manual door seal inflation system, fabricate a placard that incorporates the following words utilizing letters that are at least 0.10-inch in height, and install this placard on the instrument panel within the pilot's clear view:

"ELECTRIC DOOR SEAL INFLATION SYSTEM INOPERATIVE. THIS AIRPLANE CAN ONLY BE OPERATED IN UNPRESSURIZED FLIGHT"

  (6) Reconnect the battery before returning to service.

  (b) Prior to further flight after October 30, 1998 (the effective date of AD 98-21-21), insert a copy of this AD into the Limitations Section ofthe airplane flight manual (AFM).

NOTE 2: The prior to further flight compliance time of paragraphs (a) and (b) of this AD is being retained from AD 98-21-21. The only substantive difference between this AD and AD 98-21-21 is the addition of the alternative method of compliance referenced in paragraph (c) of this AD.

NOTE 3: This AD only applies to those aircraft equipped with the Bob Fields Aerocessories inflatable door seals. With this in mind, the owner/operator also has the option of removing all provisions of the Bob Fields Aerocessories inflatable door seals installation, and installing original equipment manufacturer door seals or an FAA-approved equivalent that is of a different design than the referenced Bob Fields Aerocessories inflatable door seals.

  (c) One of the following actions may be accomplished as an alternative method of compliance to the requirements of paragraphs (a) and (b) of this AD. No further action is required by this AD as long as one ofthese configurations remains incorporated on the aircraft.

  (1) Modify the electric door seal inflation system in accordance with the procedures in Bob Fields Aerocessories Service Bulletin No. BFA-001, Date: November 3, 1998; or

  (2) Install a manual door seal inflation system instead of an electric system. Aircraft with existing manual systems as of the effective date of this AD are excluded from the requirements of paragraphs (a) and (b) of this AD.

  (d) As of the effective date of this AD, no person may install, on any aircraft, a Bob Fields Aerocessories electric door seal inflation system unless the actions specified in Bob Fields Aerocessories Service Bulletin No. BFA-001, Date: November 3, 1998, are incorporated.

  (e) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished.(f) An alternative method of compliance or adjustment of the compliance times that provides an equivalent level of safety may be approved by the Manager, FAA, Los Angeles Aircraft Certification Office (ACO), 3960 Paramount Blvd., Lakewood, California 90712.

  (1) The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles ACO.

  (2) Alternative methods of compliance approved in accordance with AD 98-21-21 are considered approved as alternative methods of compliance for this AD.

NOTE 4: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO.

  (g) All persons affected by this directive may obtain copies of the document referred to herein upon request to Bob Fields Aerocessories, 340 East Santa Maria St., Santa Paula, California 93060; or may examine this document(s) at the FAA, Central Region,Office of the Regional Counsel, Room 506, 901 Locust, Kansas City, Missouri 64106.

  (h) This amendment revises AD 98-21-21, Amendment 39-10844.

    (i) This amendment becomes effective on May 1, 2000.

## Rule preamble

### Supplementary information

Events Leading to the Issuance of This AD A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an AD that would apply to all aircraft equipped with Bob Fields Aerocessories inflatable door seals that are installed in accordance with either the applicable Supplemental Type Certificate (STC) or through field approval was published in the Federal Register as a notice of proposed rulemaking (NPRM) on October 29, 1999 (64 FR 58359). The NPRM proposed to revise AD 98-21-21, Amendment 39-10844 (63 FR 55321, October 15, 1998). AD 98-21-21 currently requires de- activating the electric door seal inflation system, fabricating and installing a placard specifying that the system is inoperative, and inserting a copy of the AD into the Limitations Section of the airplane flight manual (AFM).

AD 98-21-21 only applies to those aircraft equipped with the Bob Fields Aerocessories inflatable door seals. With this in mind, the owner/operator also has the option of removing all provisions of the Bob Fields Aerocessories inflatable door seals installation, and installing original equipment manufacturer door seals or an FAA-approved equivalent that is of different design than the referenced Bob Fields Aerocessories inflatable door seals.

The NPRM proposed to retain the requirements of the existing AD, would exclude those airplanes incorporating a manual inflatable door seal system from the system de-activation requirements, and would provide the option of incorporating one of the modifications referenced in Bob Fields Aerocessories Service Bulletin No. BFA-001, Date: November 3, 1998, as a method of accomplishing the AD.

The NPRM was the result of the manufacturer developing a modification that would allow these electric door seal inflation systems to remain in service, and the Federal Aviation Administration (FAA) approved this modification.

Interested persons have been afforded an opportunity to participate in the making of this amendment. No comments were received on the proposed rule or the FAA's determination of the cost to the public.

The FAA's Determination After careful review of all available information related to the subject presented above, the FAA has determined that air safety and the public interest require the adoption of the rule as proposed except for minor editorial corrections. The FAA has determined that these minor corrections will not change the meaning of the AD and will not add any additional burden upon the public than was already proposed.

Cost Impact The FAA does not know the number of aircraft that have the affected electric door seal inflation systems installed. The FAA estimates that it will take approximately 3 workhours per airplane to accomplish the optional modifications that will allow these systems to be put back in service, at an average labor rate of approximately $60 an hour. Based on these figures, the total cost impact of the optional modification in this document on U.S. operators is estimated to be $180 per airplane aircraft equipped with Bob Fields Aerocessories inflatable door seals.

Regulatory Impact These regulations will not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. Therefore, the FAA has determined that this final rule does not have federalism implications under Executive Order 13132.

For the reasons discussed above, I certify that this action (1) is not a "significant regulatory action" under Executive Order 12866; (2) is not a "significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A copy of the finalevaluation prepared for this action is contained in the Rules Docket. A copy of it may be obtained by contacting the Rules Docket at the location provided under the caption "ADDRESSES".

List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety.

Adoption of the Amendment Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:

PART 39 - AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701.

39.13 [Amended] 2. Section 39.13 is amended by removing Airworthiness Directive (AD) 98-21-21, Amendment 39-10844 (63 FR 55321, October 15, 1998), and adding a new AD to read as follows:

## Affected data sheets (27) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A15](https://openairdocs.org/tcds/3A15): Textron Aviation Inc.; names 26 of 27 models: 35-C33A, 35-A33, M35, E33A, E33C, V35B, N35, K35…
- [TCDS A4CE](https://openairdocs.org/tcds/A4CE): Textron Aviation Inc.; names 26 of 29 models: TP206B, TP206C, TU206A, U206, P206C, P206E, TP206A, P206A…
- [TCDS 3A21](https://openairdocs.org/tcds/3A21): Textron Aviation Inc.; names 25 of 28 models: 210J, P210N, 210D, T210M, 210M, 210-5A (205A), 210H, 210B…
- [TCDS 3A10](https://openairdocs.org/tcds/3A10): Textron Aviation Inc.; names 19 of 23 models: 310I, 310L, T310Q, 310P, T310R, T310P, 310A, 310R…
- [TCDS 2A13](https://openairdocs.org/tcds/2A13): Piper Aircraft Inc.; names 18 of 18 models: PA-28R-180, PA-28R-201, PA-28-150, PA-28-201T, PA-28-236, PA-28-140, PA-28R-201T, PA-28S-160…
- [TCDS 3A13](https://openairdocs.org/tcds/3A13): Textron Aviation Inc.; names 18 of 23 models: 182D, 182A, 182J, 182P, 182B, TR182, 182L, 182G…
- [TCDS 3A16](https://openairdocs.org/tcds/3A16): Textron Aviation Inc.; names 15 of 21 models: 95, 95-B55, D55, 58, 95-A55, 95-C55, E95, E55…
- [TCDS 5A4](https://openairdocs.org/tcds/5A4): Textron Aviation Inc.; names 14 of 14 models: J50, D50E-5990, D50B, D50, E50, B50, D50E, C50…
- [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 13 of 18 models: 172F (USAF T-41A), 172M, 172K, 172G, 172A, 172L, 172H (USAF T-41A), 172D…
- [TCDS 5A6](https://openairdocs.org/tcds/5A6): Textron Aviation Inc.; names 11 of 11 models: 180E, 180J, 180F, 180H, 180A, 180, 180B, 180D…
- [TCDS A3SO](https://openairdocs.org/tcds/A3SO): Piper Aircraft Inc.; names 10 of 13 models: PA-32-300, PA-32-301, PA-32R-300, PA-32-260, PA-32-301T, PA-32RT-300, PA-32S-300, PA-32R-301T…
- [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 9 of 17 models: M20F, M20E, M20K, M20D, M20A, M20C, M20, M20J…
- [TCDS A-777](https://openairdocs.org/tcds/A-777): Textron Aviation Inc.; names 9 of 9 models: G35, A35, D35, 35R, B35, C35, F35, 35…
- [TCDS 3A25](https://openairdocs.org/tcds/3A25): Textron Aviation Inc.; names 8 of 11 models: 320, 320D, 320-1, 320B, 320E, 320C, 320F, 320A
- [TCDS 3A24](https://openairdocs.org/tcds/3A24): Textron Aviation Inc.; names 7 of 8 models: 185B, A185F, 185C, A185E, 185A, 185D, 185
- [TCDS 1A10](https://openairdocs.org/tcds/1A10): Piper Aircraft Inc.; names 5 of 6 models: PA-23-160, PA-23-235, PA-E23-250, PA-23-250 (Navy UO-1), PA-23
- [TCDS 1A15](https://openairdocs.org/tcds/1A15): Piper Aircraft Inc.; names 4 of 4 models: PA-24, PA-24-260, PA-24-250, PA-24-400
- [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 4 of 12 models: 175, 175B, 175C, 175A
- [TCDS A20SO](https://openairdocs.org/tcds/A20SO): Piper Aircraft Inc.; names 4 of 4 models: PA-31, PA-31-325, PA-31-300, PA-31-350
- [TCDS A23CE](https://openairdocs.org/tcds/A23CE): Textron Aviation Inc.; names 4 of 4 models: 58TC, 58P, 58TCA, 58PA
- [TCDS 1A3](https://openairdocs.org/tcds/1A3): Bellanca Aircraft Inc.; names 3 of 7 models: 17-31TC, 17-30, 17-31
- [TCDS A-799](https://openairdocs.org/tcds/A-799): Textron Aviation Inc.; names 3 of 3 models: 170, 170A, 170B
- [TCDS A18CE](https://openairdocs.org/tcds/A18CE): Bellanca Aircraft Inc.; names 3 of 3 models: 17-31ATC, 17-31A, 17-30A
- [TCDS A1EA](https://openairdocs.org/tcds/A1EA): Piper Aircraft Inc.; names 3 of 3 models: PA-40, PA-30, PA-39
- [TCDS A7SO](https://openairdocs.org/tcds/A7SO): Piper Aircraft Inc.; names 3 of 5 models: PA-34-200 (Seneca), PA-34-200T (Seneca II), PA-34-220T (Seneca V)
- [TCDS A19SO](https://openairdocs.org/tcds/A19SO): Piper Aircraft Inc.; names 2 of 2 models: PA-44-180T, PA-44-180
- [TCDS A9WE](https://openairdocs.org/tcds/A9WE) (historical): Emerald Enterprises Ltd.; names 1 of 1 models: D-1

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 85,632 (85,632 by airframe model, 0 by engine model)
- Makers: Cessna 37,607, Piper 28,891, Beech 12,390, Mooney 5,272, Raytheon 718, Bellanca 629, New Piper 68, Aerostar Acft Corp Of Texas 23, Bell 16, Wing 7

Models with the most aircraft:

- [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 4,259 aircraft (airframe model)
- [Cessna 172M](https://openairdocs.org/model/cessna-172m): 3,573 aircraft (airframe model)
- [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181): 3,549 aircraft (airframe model)
- [Piper PA-28-180](https://openairdocs.org/model/piper-pa-28-180): 3,504 aircraft (airframe model)
- [Cessna 172N](https://openairdocs.org/model/cessna-172n): 3,138 aircraft (airframe model)
- [Cessna 182P](https://openairdocs.org/model/cessna-182p): 2,099 aircraft (airframe model)
- [Beech A36](https://openairdocs.org/model/beech-a36): 1,907 aircraft (airframe model)
- [Cessna 182Q](https://openairdocs.org/model/cessna-182q): 1,565 aircraft (airframe model)
- [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161): 1,497 aircraft (airframe model)
- [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1,408 aircraft (airframe model)
- [Cessna 170B](https://openairdocs.org/model/cessna-170b): 1,299 aircraft (airframe model)
- [Mooney M20C](https://openairdocs.org/model/mooney-m20c): 1,258 aircraft (airframe model)
- [Piper PA-28R-200](https://openairdocs.org/model/piper-pa-28r-200): 1,223 aircraft (airframe model)
- [Piper PA-24-250](https://openairdocs.org/model/piper-pa-24-250): 1,222 aircraft (airframe model)
- [Cessna 180](https://openairdocs.org/model/cessna-180): 1,177 aircraft (airframe model)
- [Cessna A185F](https://openairdocs.org/model/cessna-a185f): 1,109 aircraft (airframe model)
- [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 aircraft (airframe model)
- [Piper PA-32-300](https://openairdocs.org/model/piper-pa-32-300): 992 aircraft (airframe model)
- [Beech F33A](https://openairdocs.org/model/beech-f33a): 978 aircraft (airframe model)
- [Piper PA-28-151](https://openairdocs.org/model/piper-pa-28-151): 960 aircraft (airframe model)

All 305 models: https://openairdocs.org/ad/98-21-21-R1/models.md
Every aircraft: https://openairdocs.org/ad/98-21-21-R1/aircraft.md

## Related documents

- [AD 98-21-21](https://openairdocs.org/ad/98-21-21) (historical): Inflatable Door Seals · Bob Fields Aerocessories Electric Inflatable Door Seal. Effective Oct 30, 1998. Replaced by this AD
- [STC SA2226NM](https://openairdocs.org/stc/SA2226NM): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA2510NM](https://openairdocs.org/stc/SA2510NM): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA2511NM](https://openairdocs.org/stc/SA2511NM): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA3735NM](https://openairdocs.org/stc/SA3735NM): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA3736NM](https://openairdocs.org/stc/SA3736NM): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4136WE](https://openairdocs.org/stc/SA4136WE): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4177WE](https://openairdocs.org/stc/SA4177WE): Installation of electric inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4178WE](https://openairdocs.org/stc/SA4178WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4179WE](https://openairdocs.org/stc/SA4179WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4180WE](https://openairdocs.org/stc/SA4180WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4184WE](https://openairdocs.org/stc/SA4184WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4212WE](https://openairdocs.org/stc/SA4212WE): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4234WE](https://openairdocs.org/stc/SA4234WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4235WE](https://openairdocs.org/stc/SA4235WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4236WE](https://openairdocs.org/stc/SA4236WE): Installation of inflatable door seal.. TALCO AVIATION CORP., Named in the applicability
- [STC SA4237WE](https://openairdocs.org/stc/SA4237WE): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4238WE](https://openairdocs.org/stc/SA4238WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4239WE](https://openairdocs.org/stc/SA4239WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4240WE](https://openairdocs.org/stc/SA4240WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4282WE](https://openairdocs.org/stc/SA4282WE): Installation of inflatable door seal.. TALCO Aviation Corp., Named in the applicability
- [STC SA4283WE](https://openairdocs.org/stc/SA4283WE): Installation of electric inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4284WE](https://openairdocs.org/stc/SA4284WE): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4285WE](https://openairdocs.org/stc/SA4285WE): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4286WE](https://openairdocs.org/stc/SA4286WE): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4287WE](https://openairdocs.org/stc/SA4287WE): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability
- [STC SA4288WE](https://openairdocs.org/stc/SA4288WE): Installation of inflatable door seal.. TALCO Aviation Corp. dba RAJAY Turbo Products, Named in the applicability
- [STC SA4316WE](https://openairdocs.org/stc/SA4316WE): Installation of inflatable door seal.. TALCO Aviation Corp. dba RAJAY Turbo Products, Named in the applicability
- [STC SA4385WP](https://openairdocs.org/stc/SA4385WP): Installation of inflatable door seal.. Bob Fields Aerocessories, Named in the applicability

## NTSB investigations that cite this AD (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI98FA349](https://openairdocs.org/ntsb/CHI98FA349), Sep 16, 1998: Beech 58 (N4574Q), Oakdale, WI, destroyed, 3 fatal. Probable cause: The installation of the door seal inflation system by company personnel. An additional cause was the emergency procedures not followed by the pilot-in-command. A contributing factor was the trees.

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