- Effective
- September 2, 1975
- Models
- L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15
- Data sheet
- TCDSA23WE
- Registered aircraft
- 3 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-2349
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.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
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|---|---|---|---|
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On this page
The airworthiness directive
75-12-11 LOCKHEED: Amendment 39-2234 as amended by Amendment 39-2349. Applies to L-1011-385-1 Series airplanes, certificated in all categories with Collins FCS-110 autopilot installed.
To prevent possible unwanted pitch-up while in the autoland mode, accomplish the following:
(1) Effective 48 hours after receipt of this telegram, the following operating limitation applies: 'Autopilot command mode use prohibited below 100 feet AGL', and a placard must be installed in plain view of the pilots stating:
'AUTOPILOT CMD MODE USE PROHIBITED BELOW 100' AGL'.
(2) Operators shall, by the most immediate and practicable means, notify flight crews of the foregoing.
(3) When an operator's entire fleet, including spares, incorporates the auto flight pitch computer modification described in Lockheed Service Bulletin 093-22-080, dated August 11, 1975, or later FAA-approved revisions, remove the operating limitation and placard.
Amendment 39-2234 was effective 6-12-75 for allpersons except those to whom it was made effective immediately by telegrams dated May 14, 1975.
This amendment 39-2349 is effective September 2, 1975.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 3
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.