AD 77-12-04

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AD Number:
77-12-04
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10F and DC-10-30F Airplanes
Subject:
Upper Cargo Door
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/22/1977
Make:
The Boeing Company
Model:
DC-10-10F | DC-10-30F (KC-10A, KDC-10)
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 77-12-04
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2921

AD NUMBER:   77-12-04

SUBJECT HEADING:   Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10F and DC-10-30F Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 22, 1977.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
77-12-04 MCDONNELL DOUGLAS: Amendment 39-2921. Applies to Model DC-10-10F and DC-10-30F airplanes certificated in all categories.

Compliance required within the next 1000 hours time in service after the effective date of this AD, unless already accomplished.

To reduce the possibility that operational errors could result in dispatch of an aircraft with the upper cargo door unlatched or unlocked, accomplish (a) and either (b) or (c) as follows:

(a) Install a lock mechanism viewing window on the upper cargo door and add a new instruction placard per McDonnell Douglas DC-10 Service Bulletin No. 52-120, dated September 4, 1974, or later FAA approved revision.

(b) Install an upper cargo door vent door with integral blockers for the torque tube and lock tube and add instruction placard per McDonnell Douglas DC-10 Service Bulletin No. 52-137, dated July 9, 1976, or later FAA approved revision, or

(c) After each operation of the upper cargo door, prior to flight verify that the door is flush with the fuselage, that lock pin engagement has occurred by observing through the viewing port, and secure the upper cargo door by accomplishing (1) and either (2) or (3) as follows:

(1) Install bolt (NAS 6304-17 or NAS 6404U17) with locknut in lieu of pip pin in lock tube hole.

(2) Open and secure with positive lock-out devices, the upper cargo door power circuit breakers (B1-1341, B1-1342, and B1-1343) located on the flight engineer's lower main circuit breaker panel and "upper cargo door power control" circuit breaker (B1-1340) located on the forward left cabin equipment panel; or

(3) Remove or hydraulically disconnect lock tube actuator (P/N 477667-5503).

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

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

This amendment becomes effective July 22, 1977.


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