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AD 78-23-06

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Airworthiness directive · Stall Warning System · Boeing DC-9-11, DC-9-12, DC-9-13 and 15 more

FAA copy· 21 KB
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AboutSource files 1
Effective
December 11, 1978
Models
DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F and 12 more
Data sheet
TCDSA6WE
Registered aircraft
13 matched by model
Product
Aircraft · Large airplane
Amendment
39-3343

Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.

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The airworthiness directive

78-23-06 MCDONNELL DOUGLAS: Amendment 39-3343. Applies to McDonnell Douglas DC-9-10, -20, -30, -40, -50 series airplanes, including the military versions, all serial numbers, certificated in all categories.

Compliance is required within one year after the effective date of this AD.

To reduce the probability of an unnecessary rejected takeoff due to a false stall warning just after initiation of rotation, modify the stall warning system by extending the time delay to four seconds between nose gear lift-off and the initiation of stall warning, by accomplishing the following:

(a) Modify the stall warning circuitry in accordance with McDonnell Douglas DC-9 Service Bulletin 34-131 dated January 10, 1978.

NOTE: Service Bulletin 34-131 dated January 10, 1978, is the only version of this service bulletin suitable for compliance with paragraph (a) of this AD.

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

(c) 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 December 11, 1978.

Affected TCDS · 1

The type certificate data sheets for the models this AD names, matched by model and maker.

TCDS A6WEThe Boeing CompanyNames 15 of 25 models: DC-9-12, DC-9-15F, DC-9-41 and 12 more

Registered aircraft · 13

Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.

By aircraft maker
  • Mcdonnell Douglas8
  • Douglas5
By year built
19661970

5 with no year recorded

By model

Aircraft

N112PSFrontera Flight Holdings Inc · Dover, DEBuilt 1967 · S/N 47013N127NKPerris Valley Airport Inc · Perris, CAS/N 47361N697BJTexas Air And Space Museum Inc · Amarillo, TXS/N 47799N782TWSierra American Corp · Wilmington, DEBuilt 1967 · S/N 45826N783TWSierra American Corp · Wilmington, DEBuilt 1966 · S/N 47010N784TWSierra American Corp · Wilmington, DEBuilt 1967 · S/N 47014N813TLGeoairgroup LLC · Wilmington, DES/N 45732N904CETatonduk Outfitters Limited · Fairbanks, AKBuilt 1967 · S/N 47040N9113DHeikkila Glenn R · Rockland, MAS/N 47577N930CETatonduk Outfitters Ltd · Fairbanks, AKBuilt 1969 · S/N 47363N932CETatonduk Outfitters Ltd · Fairbanks, AKBuilt 1970 · S/N 47465N934NANational Aeronautics And Space Administration · Houston, TXS/N 47428N935CETatonduk Outfitters Ltd · Fairbanks, AKBuilt 1969 · S/N 47413