# AD 67-21-01: Air Scoop

- Type: Airworthiness directive
- Status: Current
- Products: Schweizer 269A, 269A-1 and 269B
- Effective: July 3, 1967
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-440
- Registered aircraft: 134 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/85FCC207A183172B86256A38006B7425.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/67-21-01

## The airworthiness directive

67-21-01 HUGHES: Amdt. No. 39-440, Part 39, Federal Register June 28, 1967, Applies to Hughes Model 269 Series Helicopters.

Compliance required within the next 25 hours' time in service following the effective date of this AD unless already accomplished.

To prevent concentration of carbon monoxide gas in the cabin in excess of the amounts allowable under applicable airworthiness rules, accomplish the following:

Install air scoop, restrict positioning of the upper and lower air vents on the left and right hand door panels to face forward and upward, and seal cabin in accordance with Hughes Service Information Notice No. N-33 dated May 12, 1967, or later approved revision or by a method approved by the Aircraft Engineering Division, FAA Western Region, Los Angeles, California.

This amendment effective July 3, 1967.

## 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/67-21-01/models.md
Every aircraft: https://openairdocs.org/ad/67-21-01/aircraft.md

Its text cites no advisory circulars or STCs.

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