# AD 61-21-02: Thrust Reverse Procedures

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC-8-11, DC-8-12, DC-8-21, DC-8-31, DC-8-32, DC-8-33, DC-8-41, DC-8-42, DC-8-43, DC-8-51, DC-8-52, DC-8-53 and 15 more
- Published: October 20, 1961
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 8 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5079C7AA9D1D2C9C862569BC00747896.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/61-21-02

## The airworthiness directive

61-21-02 DOUGLAS: Amdt. 350 Part 507 Federal Register October 20, 1961. Applies to All DC-8 Aircraft.

Compliance required within the next 10 hours' time in service.

As an interim safety measure pending development of modifications to the throttle control system and reversing mechanism the following procedures shall be followed:

Reverse thrust after landing shall not be used until:

  (a) The main and nose gear of the aircraft are firmly on the ground,

  (b) the blue ejector lights are on steady,

  (c) the reverse power lever is positioned to reverse detent, and

  (d) the amber reverser lights are on steady.

If the amber reverser lights are on steady, additional symmetrical reverse may be used on the inboard engines and thereafter reverse power may be used on the outboard engines if required.

This directive effective for all persons except those to whom it was made effective immediately by telegram dated October 6, 1961.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A25](https://openairdocs.org/tcds/4A25): The Boeing Company; names 27 of 27 models: DC-8-41, DC-8-52, DC-8-61, DC-8-53, DC-8-51, DC-8-63, DC-8-11, DC-8-72F…

## 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: 8 (8 by airframe model, 0 by engine model)
- Makers: Douglas 5, Mcdonnell Douglas 3

Models with the most aircraft:

- [Douglas DC-8-73](https://openairdocs.org/model/douglas-dc-8-73): 2 aircraft (airframe model)
- [Douglas DC-8-73F](https://openairdocs.org/model/douglas-dc-8-73f): 2 aircraft (airframe model)
- [Mcdonnell Douglas DC-8-62](https://openairdocs.org/model/mcdonnell-douglas-dc-8-62): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-8-63](https://openairdocs.org/model/mcdonnell-douglas-dc-8-63): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-8-63F](https://openairdocs.org/model/mcdonnell-douglas-dc-8-63f): 1 aircraft (airframe model)
- [Douglas DC-8-72](https://openairdocs.org/model/douglas-dc-8-72): 1 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/61-21-02/models.md
Every aircraft: https://openairdocs.org/ad/61-21-02/aircraft.md

Its text cites no advisory circulars or STCs.

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