AD 83-13-08

AD Final Rules - DRS_83-13-08.html
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AD Number:
83-13-08
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Model 747 Airplanes
Subject:
Placard -Autopilot
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/18/1983
Make:
The Boeing Company
Model:
747-100 Series | 747-100B Series | 747-100B SUD Series | 747-200B Series | 747-200C Series | 747-200...Show more
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Superseded AD: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Superseded By: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: 83-13-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4678

AD NUMBER:   83-13-08

SUBJECT HEADING:   BOEING Model 747 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 18, 1983.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
83-13-08 BOEING: Amendment 39-4678. Applies to all model 747 airplanes, except the 747SP, certificated in all categories equipped with either the Landing Control Logic Unit (LCLU) or Landing Rollout Control Unit (LRCU) automatic landing systems and either Collins Low Range Radio Altimeter (LRRA), Model 860F-4, or Bendix Low Range Radio Altimeter, Model ALA 51A. To prevent hard landing due to false altitude information from the LRRA to the autopilot, accomplish the following, unless already accomplished:

A. Within 15 days after the effective date of this AD, install a placard on the autopilot P10 mode control panel which reads as follows: "DO NOT USE AUTOPILOT BELOW 50 FT. ON WET RUNWAYS." The placard may be removed when either paragraph B, C, or D below is accomplished.

B. Remove Collins Model 860F-4 LRRA (P/N 622-3890-0XX), if installed, and perform Collins Service Bulletin 860F-4, Service Bulletin #8. Modified units become P/N 622- 3890-1XX. Install modified, or production equivalents, according to the Boeing Service Bulletin 747-34A2225.

C. Remove Bendix Series ALA 51A LRRA (P/N 2067631-05XX or -51XX), if installed, and perform Bendix Service Bulletin M-1632-(ALA-51A-34-56). Modified units become P/N 2067631-53XX. Install modified, or production equivalents, according to Boeing Service Bulletin 747-34A2226.

D. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

All persons affected by this proposal who have not already received the Service Bulletins may obtain copies upon request to Boeing, Collins Air Transport Division, or Bendix Corporation as appropriate. These documents may also be examined at the FAA, Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective July 18, 1983.

FOOTER: