# AD 80-24-04: Placard -Front Seat Occupancy

- Type: Airworthiness directive
- Status: Current
- Products: MD Helicopters 369, 369A, 369D, 369H, 369HE, 369HM and 369HS
- Effective: December 4, 1980
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-3979
- Registered aircraft: 341 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0482407EE64D41C386256A4E004852E6.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/80-24-04

## The airworthiness directive

80-24-04 HUGHES HELICOPTERS: Amendment 39-3979. Applies to Model 369 Series Helicopters, certified in all categories, equipped with Automatic Engine Reignition System.

Compliance is required as indicated unless already accomplished.

To prevent the possibility of the middle front seat occupant accidentally deactivating the Automatic Engine Reignition System and also from blocking the crew's view of the automatic reignition "ARMED" and "RE-IGN" advisory lights, accomplish the following:

  (a) Within thirty (30) consecutive calendar days or prior to flight in falling and/or blowing snow, whichever comes first, after the effective date of this AD, install a placard in close proximity to the Automatic Engine Reignition Arming switch and in plain view of the pilot which states "Middle front seat is not to be occupied during flight in falling and/or blowing snow" or equivalent words.

  (b) Special flight permits may be issued in accordance with FAR 21.197 and .199 to operate aircraft to a base for the accomplishment of modification required this AD.

  (c) Alternative inspections, modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region.

This amendment becomes effective December 4, 1980.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H3WE](https://openairdocs.org/tcds/H3WE): MD Helicopters LLC; names 7 of 12 models: 369D, 369HS, 369HM, 369HE, 369H, 369 (Army YOH-6A), 369A (Army OH-6A)

## 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: 341 (341 by airframe model, 0 by engine model)
- Makers: Hughes Helicopters 207, Hughes 121, MD Helicopters 6, Summa 5, Hughes/Batto John 1, Hughes/Helicopter Assocs 1

Models with the most aircraft:

- [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d): 207 aircraft (airframe model)
- [Hughes 369HS](https://openairdocs.org/model/hughes-369hs): 69 aircraft (airframe model)
- [Hughes 369A](https://openairdocs.org/model/hughes-369a): 32 aircraft (airframe model)
- [Hughes 369A (OH-6A)](https://openairdocs.org/model/hughes-369a-oh-6a): 11 aircraft (airframe model)
- [Hughes 369](https://openairdocs.org/model/hughes-369): 5 aircraft (airframe model)
- [Summa 369D](https://openairdocs.org/model/summa-369d): 4 aircraft (airframe model)
- [MD Helicopters 369HS](https://openairdocs.org/model/md-helicopters-369hs): 3 aircraft (airframe model)
- [Hughes 369HE](https://openairdocs.org/model/hughes-369he): 3 aircraft (airframe model)
- [MD Helicopters 369HM](https://openairdocs.org/model/md-helicopters-369hm): 2 aircraft (airframe model)
- [Summa 369HS](https://openairdocs.org/model/summa-369hs): 1 aircraft (airframe model)
- [MD Helicopters 369A](https://openairdocs.org/model/md-helicopters-369a): 1 aircraft (airframe model)
- [Hughes/Helicopter Assocs 369A](https://openairdocs.org/model/hughes-helicopter-assocs-369a): 1 aircraft (airframe model)
- [Hughes/Batto John 369A (OH-6A)](https://openairdocs.org/model/hughes-batto-john-369a-oh-6a): 1 aircraft (airframe model)
- [Hughes 369H](https://openairdocs.org/model/hughes-369h): 1 aircraft (airframe model)

All 14 models: https://openairdocs.org/ad/80-24-04/models.md
Every aircraft: https://openairdocs.org/ad/80-24-04/aircraft.md

Its text cites no advisory circulars or STCs.

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