# AD 75-09-06: Engine Induction Air Duct

- Type: Airworthiness directive
- Status: Current
- Products: Cessna A185E, A185F, A188, A188A and A188B
- Effective: May 5, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2176
- Registered aircraft: 1,623 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4B986DE8A5351FE286256A3400650AE3.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-09-06

## The airworthiness directive

75-09-06 CESSNA: Amendment 39-2176. Applies to A185 series (Serial Numbers 18502008 through 18502650) airplanes and A188 series (Serial Numbers 18800833 through 18801374).

Compliance: Required as indicated, unless already accomplished.

To preclude the collapse of the existing flexible engine induction air duct, within the next 50 hours' time in service after the effective date of this AD, accomplish the following:

Replace the flexible engine induction air duct with a new flexible engine induction air duct (P/N 1650044-1); duct adapter (P/N 1652021-10); and drain line (P/N 0700147-82)(A185 only), in accordance with Cessna Service Letter SE75-5, dated February 7, 1975, or later approved revisions, or any alternate means of compliance approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective May 5, 1975.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A9CE](https://openairdocs.org/tcds/A9CE): Textron Aviation Inc.; names 3 of 7 models: A188A, A188B, A188
- [TCDS 3A24](https://openairdocs.org/tcds/3A24): Textron Aviation Inc.; names 2 of 8 models: A185F, A185E

## 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: 1,623 (1,623 by airframe model, 0 by engine model)
- Makers: Cessna 1,623

Models with the most aircraft:

- [Cessna A185F](https://openairdocs.org/model/cessna-a185f): 1,120 aircraft (airframe model)
- [Cessna A185E](https://openairdocs.org/model/cessna-a185e): 252 aircraft (airframe model)
- [Cessna A188B](https://openairdocs.org/model/cessna-a188b): 212 aircraft (airframe model)
- [Cessna A188](https://openairdocs.org/model/cessna-a188): 22 aircraft (airframe model)
- [Cessna A188A](https://openairdocs.org/model/cessna-a188a): 17 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/75-09-06/models.md
Every aircraft: https://openairdocs.org/ad/75-09-06/aircraft.md

Its text cites no advisory circulars or STCs.

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