# AD 71-06-01: Faults, Failures and Improper Operation

- Type: Airworthiness directive
- Status: Current
- Products: Textron 99, 99A, 99A (FACH), A99, A99A, B99 and C99
- Effective: October 19, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1321
- Registered aircraft: 95 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BCAD579FD80ACB7A86256E01005AD123.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/71-06-01

## The airworthiness directive

71-06-01 BEECH: Amdt. 39-1170 as amended by Amendment 39-1222 is further amended by Amendment 39-1321. Applies to all 99 series airplanes (Serial Numbers as applicable).

Compliance: Required as indicated, unless already accomplished.

To preclude the occurrence of faults, failures and improper operation, accomplish the following:

A) On all 99 series airplanes (Serial Numbers U-1 through U-95, U-97 through U- 127, U-130 through U-133, U-135 and U-136) within the next 100 hours' time-in-service after the effective date of this AD, modify the flap position selector in accordance with Beechcraft Service Instruction 0328-158 or later FAA approved revision, or by any other method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region, Kansas City, Missouri.

B) On all 99 series airplanes (Serial Numbers U-1 through U-133, U-135 and U- 136) within the next 100 hours' time-in-service after the effective date of this AD, modify the landing gear indicator and warning device in accordance with Beechcraft Service Instruction 0313-158 and 0318-350, or later FAA approved revision, or by any other method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region, Kansas City, Missouri.

C) On all 99 series airplanes (Serial Numbers U-2 through U-103, U-105 through U- 133, U-135 and U-136) within the next 75 hours' time-in-service after the effective date of this AD, modify the gear selector panel in accordance with Beechcraft Service Instructions 0299-395 or later FAA approved revision, or by any other method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region, Kansas City, Missouri.

D) On all 99 series airplanes (Serial Numbers U-1 through U-103 and U-106 through U-135) within the next 75 hours' time-in-service after the effective date of this AD, modify the instrument static air system in accordance with Beechcraft Service Instruction 0291- 394, Rev. 1, or later FAA approved revision, or by any other method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region, Kansas City, Missouri.

E) On Models 99 and 99A (Serial Numbers U-1 through U-136) airplanes within the next 100 hours' time-in-service after the effective date of this AD (March 16, 1971), inspect and test the electrical power distribution system in accordance with Beechcraft Service Instructions 0348-351 or later FAA approved revision, or by any other method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region, Kansas City, Missouri.

Amendment 39-1170 became effective March 16, 1971.

Amendment 39-1222 became effective June 3, 1971.

This Amendment 39-1321 becomes effective October 19, 1971.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A14CE](https://openairdocs.org/tcds/A14CE): Textron Aviation Inc.; names 6 of 12 models: A99, A99A, C99, B99, 99A, 99

## 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: 95 (95 by airframe model, 0 by engine model)
- Makers: Beech 95

Models with the most aircraft:

- [Beech C-99](https://openairdocs.org/model/beech-c-99): 54 aircraft (airframe model)
- [Beech 99](https://openairdocs.org/model/beech-99): 23 aircraft (airframe model)
- [Beech 99A](https://openairdocs.org/model/beech-99a): 11 aircraft (airframe model)
- [Beech B-99](https://openairdocs.org/model/beech-b-99): 6 aircraft (airframe model)
- [Beech A99](https://openairdocs.org/model/beech-a99): 1 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/71-06-01/models.md
Every aircraft: https://openairdocs.org/ad/71-06-01/aircraft.md

Its text cites no advisory circulars or STCs.

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