# AD 75-01-07: Exhaust System Failures

- Type: Airworthiness directive
- Status: Current
- Products: Textron S35, V35, V35A and V35B with STC SA1035WE
- Effective: January 13, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2065
- Registered aircraft: 2,118 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5DDBEA9B30E321B586256A08006E87F5.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/75-01-07

## The airworthiness directive

75-01-07 BEECH: Amendment 39-2065. Applies to Beech Models S35, V35, V35A and V35B airplanes certificated in all categories with Continental TS1O-520-D engines installed in accordance with STC SA1035WE or Beech Drawing No. 35-910028.

Compliance required as indicated, unless previously accomplished.

To minimize exhaust system failures, accomplish the following:

  (a) Within the next 10 hours time in service after the effective date of this airworthiness directive, conduct a visual inspection of the bellows portion of the exhaust wastegate elbow assembly, AiResearch Part Number 286-S35-074-137. If a crack is found, the elbow assembly must be modified per paragraph (b) below prior to further flight.

  (b) Within the next 100 hours time in service after the effective date of this airworthiness directive, but not later than July 1, 1975, remove the exhaust wastegate elbow assembly, AiResearch Part Number 286-S35-074-137 and cut off the bellows portion in accordance withAiResearch Aviation Company Service Bulletin No. 14.1.12 dated December 24, 1974 or later FAA approved revision thereto. Reinstall the elbow using adapter sleeve, AiResearch Part Number 286-S35-074-141.

Equivalent modification may be approved by the Chief, Aircraft Engineering Division, FAA Western Region.

NOTE: For the requirements regarding the listing of compliance of and method of compliance with this airworthiness directive in the permanent record of the airplane, see FAR 91- 173.

This amendment becomes effective January 13, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A15](https://openairdocs.org/tcds/3A15): Textron Aviation Inc.; names 4 of 27 models: V35B, V35, S35, V35A

## 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: 2,118 (2,118 by airframe model, 0 by engine model)
- Makers: Beech 2,118

Models with the most aircraft:

- [Beech V35B](https://openairdocs.org/model/beech-v35b): 913 aircraft (airframe model)
- [Beech S35](https://openairdocs.org/model/beech-s35): 459 aircraft (airframe model)
- [Beech V35](https://openairdocs.org/model/beech-v35): 425 aircraft (airframe model)
- [Beech V35A](https://openairdocs.org/model/beech-v35a): 321 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/75-01-07/models.md
Every aircraft: https://openairdocs.org/ad/75-01-07/aircraft.md

## Related documents

- [STC SA1035WE](https://openairdocs.org/stc/SA1035WE): Installation of Continental TSIO-520-D engine in accordance with FAA Sealed AiResearch Drawing No. 101-S35-209.. Standard Aero, Named in the applicability

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