- Effective
- February 19, 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
- 39-2090
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.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 21 KB | dd9aa59f…2e43c74 | FAA DRS (API key needed) |
On this page
The airworthiness directive
75-04-10 LOCKHEED: Amendment 39-2090. Applies to L-1011-385-1 airplanes certificated in all categories.
Compliance required within 10 calendar days after the effective date of this AD, unless already accomplished.
To prevent heater blanket overheat conditions and possible fires caused by a malfunctioning cargo sump drain heater, Electrofilm P/N 111202-101 (LAC Control No. 672726- 101), accomplish (a) or (b) below:
(a) Disconnect the C-1, C-2, and C-3 cargo compartment drain heaters per Lockheed Alert Service Bulletin 093-30-A032, dated January 23, 1975, or later FAA-approved revisions, or;
(b) Equivalent deactivation modifications approved by the Chief, Aircraft Engineering Division, FAA Western Region.
(c) An airplane may be flown to a base for the performance of the work required by this AD per FAR's 21.197 and 21.199.
(d) The C-1, C-2 and C-3 cargo compartment drain heaters may be reactivated in accordance with modifications or instructions approved by theChief, Aircraft Engineering Division, FAA Western Region. The approved data must reference this AD, and the FAA-approval date.
This amendment becomes effective February 19, 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.