# AD 64-26-01: Autopilot

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 727-100 Series, 727-100C Series, 727-200 Series, 727-200F Series, 727 Series and 727C Series
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 25 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/015231889AB74231862569920053249E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/64-26-01

## The airworthiness directive

64-26-01 BOEING: Amdt 830 Part 39 (New) Federal Register November 18, 1964. Applies to Model 727 Series Aircraft.

Compliance required as indicated.

  (a) Before further flight after the effective date of this AD, open the SP-50 autopilot roll and pitch d.c. circuit breakers on panel P-18.

  (b) At the first scheduled stop where facilities and personnel are available secure these circuit breakers in the off position.

  (c) Autopilot may be reactivated when modified in accordance with Boeing Service Bulletin 22-7 dated October 27, 1964, or an FAA Western Region Aircraft Engineering Division approved equivalent.

This directive effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated October 23, 1964.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A3WE](https://openairdocs.org/tcds/A3WE): The Boeing Company; names 6 of 6 models: 727-100 Series, 727 Series, 727-200 Series, 727-100C Series, 727-200F Series, 727C Series

## 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: 25 (25 by airframe model, 0 by engine model)
- Makers: Boeing 25

Models with the most aircraft:

- [Boeing 727-223](https://openairdocs.org/model/boeing-727-223): 9 aircraft (airframe model)
- [Boeing 727-227](https://openairdocs.org/model/boeing-727-227): 4 aircraft (airframe model)
- [Boeing 727-225](https://openairdocs.org/model/boeing-727-225): 2 aircraft (airframe model)
- [Boeing 727-200F](https://openairdocs.org/model/boeing-727-200f): 1 aircraft (airframe model)
- [Boeing 727-200](https://openairdocs.org/model/boeing-727-200): 1 aircraft (airframe model)
- [Boeing 727-212](https://openairdocs.org/model/boeing-727-212): 1 aircraft (airframe model)
- [Boeing 727-230](https://openairdocs.org/model/boeing-727-230): 1 aircraft (airframe model)
- [Boeing 727-232](https://openairdocs.org/model/boeing-727-232): 1 aircraft (airframe model)
- [Boeing 727-243](https://openairdocs.org/model/boeing-727-243): 1 aircraft (airframe model)
- [Boeing 727-247](https://openairdocs.org/model/boeing-727-247): 1 aircraft (airframe model)
- [Boeing 727-264](https://openairdocs.org/model/boeing-727-264): 1 aircraft (airframe model)
- [Boeing 727-281](https://openairdocs.org/model/boeing-727-281): 1 aircraft (airframe model)
- [Boeing 727-277](https://openairdocs.org/model/boeing-727-277): 1 aircraft (airframe model)

All 13 models: https://openairdocs.org/ad/64-26-01/models.md
Every aircraft: https://openairdocs.org/ad/64-26-01/aircraft.md

Its text cites no advisory circulars or STCs.

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