# AD 83-02-05: Exhaust Nozzle Plug

- Type: Airworthiness directive
- Status: Historical
- Products: McDonnell Douglas DC-8-71, DC-8-71F, DC-8-72, DC-8-72F, DC-8-73 and DC-8-73F
- Effective: February 7, 1983
- Superseded by: [AD 94-22-07](https://openairdocs.org/ad/94-22-07)
- Product type: Aircraft, Large airplane
- Amendment: 39-4544
- Registered aircraft: 5 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CA26D3DB18B4057E86256A1E004C5F5E.0001
- DRS record last changed: August 7, 2025
- Page: https://openairdocs.org/ad/83-02-05

## The airworthiness directive

83-02-05 MCDONNELL DOUGLAS: Amendment 39-4544. Applies to McDonnell Douglas Model DC-8-70 series airplanes, certificated in all categories. Compliance required as indicated, unless previously accomplished.

To prevent separation of the exhaust nozzle plug, accomplish the following within 300 flight hours after the effective date of this AD:

A. Replace all NAS560XK4-5 screws with NAS560XK4-4 screws and check for running torque at the exhaust plug splice in accordance with McDonnell Douglas DC-8-70 Alert Service Bulletin A78-107, dated November 30, 1982, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

B. Replace all nut plates not meeting the minimum run down torque of five-inch pounds.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

D. Alternate means of compliance which providean equivalent level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-750 (54-60). These documents also may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California.

This amendment becomes effective February 7, 1983.

## 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 6 of 27 models: DC-8-72F, DC-8-73, DC-8-71, DC-8-72, DC-8-71F, DC-8-73F

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

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)
- [Douglas DC-8-72](https://openairdocs.org/model/douglas-dc-8-72): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/83-02-05/models.md
Every aircraft: https://openairdocs.org/ad/83-02-05/aircraft.md

## Related documents

- [AD 94-22-07](https://openairdocs.org/ad/94-22-07): Engine Exhaust Nozzle Plug · Boeing DC-8-71, DC-8-72 and DC-8-73. Effective Dec 12, 1994. Supersedes this AD

Its text cites no advisory circulars or STCs.

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