# AD 78-08-11: Stall Warning System

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC-10-10, DC-10-10F, DC-10-30, DC-10-30F (KC-10A, KDC-10) and DC-10-40
- Effective: May 18, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3190
- Registered aircraft: 25 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9B5855535478336B862569CA004DC6D9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-08-11

## The airworthiness directive

78-08-11 MCDONNELL DOUGLAS: Amendment 39-3190. Applies to DC-10-10, -10F, -30, -30F and -40 Series airplanes, certificated in all categories.

Compliance required before April 10, 1979, unless already accomplished, or unless incorporated in production.

To minimize the probability of an aborted takeoff resulting from a false stall warning during the takeoff roll, add a five second time delay between nose gear lift-off and the initiation of a stall warning by accomplishing the following:

  (a) Modify the airplanes in accordance with McDonnell Douglas DC-10 Service Bulletin 22-94 dated August 4, 1977, or later FAA approved revisions.

  (b) Incorporate revisions in the FAA Approved Airplane Flight Manual, Documents MDC-J1010, MDC-J1030, MDC-J5830, MDC-J1040 and MDC-J2140, by adding the following new heading and text in Section III Procedures:

STALL WARNING PREFLIGHT CHECK

Rotate "STALL TEST" switch to "L (MOM)." Note five second delay before stick shaker activation. Rotate "STALL TEST" switch to "R (MOM)." Again note five second delay before stick shaker activation.

  (c) Equivalent modifications, procedures, or revisions may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region.

  (d) Special flight permits may be issued in accordance with FAR's 21.197 and 21.199 to operate airplanes to a base for accomplishment of the modification required by this AD.

This amendment becomes effective May 18, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A22WE](https://openairdocs.org/tcds/A22WE): The Boeing Company; names 5 of 11 models: DC-10-40, DC-10-10F, DC-10-30, DC-10-30F (KC-10A KDC-10), DC-10-10

## 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: 25 (25 by airframe model, 0 by engine model)
- Makers: Mcdonnell Douglas 13, Douglas 7, Mcdonnell-Douglas 5

Models with the most aircraft:

- [Mcdonnell Douglas DC-10-30F](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30f): 12 aircraft (airframe model)
- [Douglas DC-10-40](https://openairdocs.org/model/douglas-dc-10-40): 6 aircraft (airframe model)
- [Mcdonnell-Douglas DC-10-30](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30): 5 aircraft (airframe model)
- [Douglas DC-10-30F](https://openairdocs.org/model/douglas-dc-10-30f): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-10-30F (KDC-10)](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30f-kdc-10): 1 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/78-08-11/models.md
Every aircraft: https://openairdocs.org/ad/78-08-11/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.