AD 74-18-11

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AD Number:
74-18-11
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LOCKHEED Model L-1011 Airplanes
Subject:
Ground Speed Brake
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
09/03/1974
Make:
Lockheed Martin Corporation
Model:
L-1011-385-1 | L-1011-385-1-14 | L-1011-385-1-15 | L-1011-385-3
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Superseded AD: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Superseded By: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: 74-18-11
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1944

AD NUMBER:   74-18-11

SUBJECT HEADING:   LOCKHEED Model L-1011 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective September 3, 1974.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
74-18-11 LOCKHEED: Amendment 39-1944. Applies to L-1011 airplanes certificated all categories.

Compliance required as indicated, unless already accomplished:

To prevent inadvertent activation of the automatic ground speed brakes, accomplish the following:

(1) Prior to further flight, deactivate the automatic ground speed brake (AGSB) system and install placards, per (a), or (b) below.

(a) Remove both DLC/AUTO-SPLR engage switch light mechanisms in the flight station overhead Flight Control Electronics System (FCES) control panel or accomplish Lockheed Alert Service Bulletin 093-22-A066. Install a placard on Captain's and F/O instrument panels directly below vertical speed indicators stating: "DLC/AUTO SPOILERS INOPERATIVE. REFER TO AFM OR EQUIVALENT."

(b) Equivalent de-activation of AGSB system procedures and placards and equivalent system modifications may be approved by the Chief, Aircraft Engineering Division, FAA Western Region.

(c) Aircraft may be flown to a base where maintenance required by this AD may be performed, per FAR's 21.197 and 21.199.

(2) An operator may reactivate the DLC/AGSB system and remove the placards required by this AD on his fleet of L-1011 airplanes after all of the following are accomplished:

(a) All FCES computers both in service and spares in an individual operators fleet are modified per Lockheed Service Bulletin 093-22-067, dated April 22, 1974, or later FAA- approved revisions, and that parts pooling is controlled such that no spares, aside from the type listed, will be installed.

(b) All proximity logic boxes both in service and spares in an individual operator's fleet are modified per Lockheed Service Bulletin 093-31-029, dated August 8, 1974, or later FAA-approved revisions, and that parts pooling is controlled such that no spares, aside from the type listed, will be installed.

(c) The L-1011 aircraft maintenance manual 22-00-00 is revised to incorporate the intent of temporary revision 4N, for use at the interval defined in the MRB document.

(d) All Airplane Flight Manuals in an individual operator's fleet are revised to incorporate pages 3-28, 3-28.1, 3-28.2 and 3.29 of AFM LR 25225 and pages 3-29, 3-30, 3-30.1 and 3-30.2 of AFM LR 25925 dated August 15, 1974, or later FAA-approved revisions and aircraft operating procedures are amended and adopted immediately to include flight crew monitoring of the speed brake lever for proper DLC operation when moving the wing flap control lever beyond the 30 degree flap lever position.

(3) An operator may reactivate the DLC/AGSB system and remove the placards required by this AD after making equivalent modifications approved by the Chief, Aircraft Engineering Division, FAA Western Region.

This supersedes Amendment 39-1814 (39 F.R. 13258), AD 74-08-08.

This amendment becomes effective September 3, 1974.

FOOTER: