# AD 66-03-02: Electrical System

- Type: Airworthiness directive
- Status: Current
- Products: Schweizer 269A, 269A-1 and 269B
- Effective: January 14, 1966
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-181
- Registered aircraft: 134 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD3301E3043A43C886256A380068D7F1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/66-03-02

## The airworthiness directive

66-03-02 HUGHES: Amdt. 39-181, Part 39, Federal Register January 14, 1966. Applies to Models 269A, 269A-1, and 269B Helicopters.

Compliance required within the next 100 hours' time in service after the effective date of this AD, unless already accomplished.

To eliminate a possible navigational hazard, accomplish the following:

  (a) On helicopters with the 12-volt electrical system, remove the existing tail position light bulb and replace it with General Electric No. 1777 bulb or FAA-approved equivalent.

  (b) On helicopters with the 24-volt electrical system, remove the existing bulb and replace it with a Grimes No. 1683 bulb or FAA-approved equivalent.

(Hughes Service Notices Nos. 2A-54 (269A), 2A-1-21 (269A-1 and (2B-22), (269B) dated October 28, 1965, pertain to this same modification.)

This directive effective January 14, 1966.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4H12](https://openairdocs.org/tcds/4H12): Schweizer RSG LLC; names 3 of 6 models: 269B, 269A-1, 269A

## 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: 134 (134 by airframe model, 0 by engine model)
- Makers: Hughes 133, Schweizer 1

Models with the most aircraft:

- [Hughes 269A](https://openairdocs.org/model/hughes-269a): 97 aircraft (airframe model)
- [Hughes 269B](https://openairdocs.org/model/hughes-269b): 31 aircraft (airframe model)
- [Hughes 269A-1](https://openairdocs.org/model/hughes-269a-1): 5 aircraft (airframe model)
- [Schweizer 269A](https://openairdocs.org/model/schweizer-269a): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/66-03-02/models.md
Every aircraft: https://openairdocs.org/ad/66-03-02/aircraft.md

Its text cites no advisory circulars or STCs.

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