# AD 77-10-10: Electrical System

- Type: Airworthiness directive
- Status: Current
- Products: Sabreliner NA-265-80
- Effective: May 23, 1977
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-2902
- Registered aircraft: 2 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/868FC4B8F5152798862569BB00688CD9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/77-10-10

## The airworthiness directive

77-10-10 ROCKWELL INTERNATIONAL: Amendment 39-2902. Applies to NA- 265-80 airplanes, serial numbers 380-1 through 380-4, 380-6 through 380-9, 380-11 through 380-13, 380-15, 380-17, 380-19, 380-21, 380-23, 380-25, 380-27, 380-30, 380-32, 380-34, 380- 36 and 380-38 through 380-54, with Relay K1066 installed (Cutler-Hammer P/N 6141H126), certificated in all categories.

Compliance required on or before June 7, 1977, unless already accomplished.

To provide electrical protection for the Instrument Inverter power input cable, and improve thermal isolation of the Instrument Inverter Remote Reset Circuit Breaker Relay (K1066), accomplish the following:

  (a) Modification specified in Rockwell International Sabreliner Service Bulletin No. 28, dated April 8, 1977, or later FAA approved revisions.

  (b) Equivalent procedures may be approved by the Chief, Aircraft Engineering Division, FAA Western Region, upon submission of adequate substantiation data.

  (c) Special flight permits may be issued in accordance with FAR's 21.197 and 21.199 to operate airplanes to a base for accomplishment of the modification required by this AD.

This amendment becomes effective May 23, 1977.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A2WE](https://openairdocs.org/tcds/A2WE): Sabreliner Aviation LLC; names 1 of 8 models: NA-265-80

## 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: 2 (2 by airframe model, 0 by engine model)
- Makers: North American 1, Rockwell International 1

Models with the most aircraft:

- [North American NA-265-80](https://openairdocs.org/model/north-american-na-265-80): 1 aircraft (airframe model)
- [Rockwell International NA-265-80](https://openairdocs.org/model/rockwell-international-na-265-80): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/77-10-10/models.md
Every aircraft: https://openairdocs.org/ad/77-10-10/aircraft.md

Its text cites no advisory circulars or STCs.

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