# AD 85-25-11: Nuts - Cessna P/N NAS1291-8

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 425 and 441
- Effective: February 12, 1986
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-5234
- Registered aircraft: 333 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B32DD513EB8C73D1862569BA004BE2DB.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/85-25-11

## The airworthiness directive

85-25-11 CESSNA: Amendment 39-5234. Applies to Models 425 (Serial Numbers 425-0002 thru 425-0236) and 441 (Serial Numbers 441-0001 thru 441-0354) airplanes certificated in any category.

Compliance: Required within the next ten hours time-in-service, unless previously accomplished.

To preclude failure of the horizontal stabilizer front spar attachments accomplish the following:

  (a) Replace left and right horizontal stabilizer front spar attach bolt retaining nuts (Part Number NAS1291-8) in accordance with the instructions contained in Cessna Service Bulletin No. CQB85-25, Revision 1, dated December 16, 1985. Purchase replacement NAS1291-8 nuts exclusively from the Cessna Supply Division after November 22, 1985, per the above Cessna Service Bulletin.

  (b) Return removed NAS1291-8 nuts to Cessna in accordance with Cessna Service Bulletin No. CQB85-25, Revision 1, dated December 16, 1985.

  (c) Aircraft may be flown in accordance with FAR 21.197 to a location where this AD can be accomplished.

  (d) An equivalent method of compliance with this AD may be used when approved by the Manager, Wichita Aircraft Certification Office, Federal Aviation Administration, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209.

All persons affected by this directive may obtain copies of the document referred to herein upon request to the Cessna Aircraft Company, Customer Services, Post Office Box 1521, Wichita, Kansas 67201 or the FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment becomes effective February 12, 1986, as to all persons except those persons to whom it was made immediately effective by priority letter AD 85-25-11, issued December 18, 1985, which contained this amendment.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A28CE](https://openairdocs.org/tcds/A28CE): Textron Aviation Inc.; names 1 of 1 models: 441
- [TCDS A7CE](https://openairdocs.org/tcds/A7CE): Textron Aviation Inc.; names 1 of 16 models: 425

## 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: 333 (333 by airframe model, 0 by engine model)
- Makers: Cessna 333

Models with the most aircraft:

- [Cessna 441](https://openairdocs.org/model/cessna-441): 172 aircraft (airframe model)
- [Cessna 425](https://openairdocs.org/model/cessna-425): 161 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/85-25-11/models.md
Every aircraft: https://openairdocs.org/ad/85-25-11/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.