# AD 76-17-02: Cabin Window

- Type: Airworthiness directive
- Status: Current
- Products: Textron 58P and 58PA
- Effective: October 31, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3324
- Registered aircraft: 301 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AC5533E68DA0B78386256E0D004DF270.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/76-17-02

## The airworthiness directive

76-17-02 BEECH: Amendment 39-2697 as amended by amendment 39-3324. Applies to Models 58P and 58PA (Serial Numbers TJ-2 through TJ-19, TJ-21 through TJ-45, TJ-47 through TJ-54, and TJ-56 through TJ-58) airplanes certificated in all categories.

Compliance: Required as indicated, unless already accomplished.

To prevent cracking of the cabin window located just forward of the cabin entrance door on the left side of the airplane, with resultant loss of cabin pressurization, accomplish the following:

A. On airplanes that do not have the window frame reinforcement installed, as defined in Beechcraft Service Instructions 0828-110, Revision I or later approved revisions, accomplish the following in accordance with said service instructions:

1. Within 25 hours' time in service after the effective date of this AD and at the two next 50 hour time in service intervals thereafter, visually inspect the cabin window just forward of the cabin door on the left side of the airplane for cracks and if cracks are found during any inspection required herein, prior to any flight during which the cabin is pressurized, replace the window and install the window frame reinforcement.

2. If no cracks have been found during any inspection required in Paragraph A.1., within 100 hours' time in service after the initial inspection required by Paragraph A.1. install the window frame reinforcement.

B. On airplanes that are flown unpressurized following discovery of a cracked window during any inspection required by Paragraph A of this Airworthiness Directive:

1. Fabricate a placard worded as follows: "DO NOT PRESSURIZE IN FLIGHT" and

2. Install said placard near the cabin pressurization control switch, and

3. Operate the aircraft in accordance with the placard until the cracked window is replaced.

C. Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.Amendment 39-2697 became effective August 24, 1976.

This amendment 39-3324 becomes effective October 31, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A23CE](https://openairdocs.org/tcds/A23CE): Textron Aviation Inc.; names 2 of 4 models: 58P, 58PA

## 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: 301 (301 by airframe model, 0 by engine model)
- Makers: Beech 301

Models with the most aircraft:

- [Beech 58P](https://openairdocs.org/model/beech-58p): 298 aircraft (airframe model)
- [Beech 58PA](https://openairdocs.org/model/beech-58pa): 3 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/76-17-02/models.md
Every aircraft: https://openairdocs.org/ad/76-17-02/aircraft.md

Its text cites no advisory circulars or STCs.

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