# AD 78-16-06: Structural Integrity of Trim Tab Rod

- Type: Airworthiness directive
- Status: Current
- Products: Textron B19, B24R, C23 and C24R
- Effective: August 14, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3275
- Registered aircraft: 897 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EDD908D5EA12493286256A080072DC53.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/78-16-06

## The airworthiness directive

78-16-06 BEECH: Amendment 39-3275. Applies to the following models and serial number airplanes certificated in all categories:

Model Serial Numbers B19 MB-558 through MB-886 C23 M-1413, M-1414, M-1416 through M-1418, M-1420 through M-1422, M-1424 through M-1438, M-1440 through M-1446, M-1448 through M-2009, M-2011 through M-2015, and M-2017 through M-2020. B24R MC-151 through MC-448, MC-450, and MC-451. C24R MC-449, MC-452 through MC-559, MC-561 through MC-563, MC-565 through MC-568 and MC-571.

COMPLIANCE: Required as indicated unless already accomplished.

To assure continued structural integrity of the rod between the stabilator trim tab actuator and the trim tab, within the next 25 hours time-in-service after the effective date of this AD, accomplish the following:

A) Visually inspect both ends of the stabilator trim tab actuator rod for proper rivet location, security of rivets and security of clevis fittings and rework if necessary, all in accordance with Beechcraft Service Instructions Number 0994 or later approved revisions.

B) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective on August 14, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A1CE](https://openairdocs.org/tcds/A1CE): Textron Aviation Inc.; names 4 of 14 models: B19, C24R, B24R, C23

## 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: 897 (897 by airframe model, 0 by engine model)
- Makers: Beech 897

Models with the most aircraft:

- [Beech C23](https://openairdocs.org/model/beech-c23): 456 aircraft (airframe model)
- [Beech C24R](https://openairdocs.org/model/beech-c24r): 176 aircraft (airframe model)
- [Beech B19](https://openairdocs.org/model/beech-b19): 145 aircraft (airframe model)
- [Beech B24R](https://openairdocs.org/model/beech-b24r): 117 aircraft (airframe model)
- [Beech B-19 SPORT](https://openairdocs.org/model/beech-b-19-sport): 2 aircraft (airframe model)
- [Beech C 23](https://openairdocs.org/model/beech-c-23): 1 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/78-16-06/models.md
Every aircraft: https://openairdocs.org/ad/78-16-06/aircraft.md

Its text cites no advisory circulars or STCs.

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