AD 89-18-13

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AD Number:
89-18-13
Document Type:
AD Final Rules
Docket Number:
89-NM-24-AD
Subject Heading:
Airworthiness Directives; BRITISH AEROSPACE Model DH/HS/BH/BAe 125 Series Airplanes
Subject:
AFM Changes - APU
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
09/28/1989
Make:
Textron Aviation Inc.
Model:
BAe.125 Series 1000A | BAe.125 Series 1000B | BAe.125 Series 800A | BAe.125 Series 800A (C-29A) | BA...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Superseded AD: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Superseded By: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: 89-18-13
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   89-NM-24-AD

AMENDMENT:   39-6309

AD NUMBER:   89-18-13

SUBJECT HEADING:   Airworthiness Directives; BRITISH AEROSPACE Model DH/HS/BH/BAe 125 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective September 28, 1989.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   89-18-13 BRITISH AEROSPACE: Amendment 39-6309. (Docket No. 89-NM-24-AD)
Applicability: Model DH/HS/BH/BAe 125 series airplanes certificated in any category, equipped with Sundstrand Turbomach Titan Gas Turbine Auxiliary Power (APU) Unit, Model T- 62T Series, installed in the aft equipment compartment of the airplane.

NOTE: Installation of the subject APU's has been in accordance with, but are not limited to, the following Supplemental Type Certificates (STC):

SA674CE	SA1143EA	SA1176EA
SA1196EA	SA440NE	SA1173EA
	SA4710SW	SA1923SW

This AD applies to all Sundstrand Turbomach Titan APU installations in the aft equipment compartment.

Compliance: Required as indicated unless previously accomplished.

To prevent a fire in the aft equipment compartment, puncture of the aft pressure bulkhead, and severance of the control cables, due to an uncontained APU rotor failure, accomplish the following:

A. Within the next 10 days after the effective date of this AD:

1. Revise the Limitations Section in the FAA-approved Airplane Flight Manual (AFM) Supplement to include the following statement. This may be accomplished by inserting a copy of this AD in the AFM Supplement Limitations Section: "OPERATION OF THE APU DURING FLIGHT IS PROHIBITED, EXCEPT DURING AN EMERGENCY."

2. Install a placard next to the APU start switch in the cockpit to state: "OPERATION OF THE APU DURING FLIGHT IS PROHIBITED, EXCEPT DURING AN EMERGENCY."

B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region, Transport Airplane Directorate.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Standardization Branch, ANM-113.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of modifications required by this AD.

This amendment (39-6309, AD 89-18-13) becomes effective on September 28, 1989.

FOOTER: