AD 73-15-03

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AD Number:
73-15-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; AVIONS MARCEL DASSAULT Model Fan Jet Falcon Airplanes
Subject:
Leakage of Hot Air into Rear Compartment
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
08/15/1973
Make:
Dassault Aviation
Model:
Fan Jet Falcon
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Superseded AD: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Superseded By: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: 73-15-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1688

AD NUMBER:   73-15-03

SUBJECT HEADING:   Airworthiness Directives; AVIONS MARCEL DASSAULT Model Fan Jet Falcon Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective August 15, 1973.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
73-15-03 AVIONS MARCEL DASSAULT: Amendment 39-1688. Applies to Fan Jet Falcon airplanes, Serial Numbers 1 thru 111, which have aluminum alloy air conditioning pipes, P/N's MY20-721-28-1 and MY20-721-61-1, installed.

Compliance is required as indicated.

To prevent leakage of very hot air into the rear compartment, accomplish the following, unless already accomplished:

(a) Within the next 100 hours' time in service after the effective date of this AD, comply with subparagraphs (1) and (2), and thereafter comply with subparagraph (1) at intervals not to exceed 200 hours' time in service from the last inspection.

(1) Visually inspect the studs which retain the SEMCA coupling on pipe, P/N MY20-721-28-1, for scoring or bending, and inspect the holes receiving those studs for stretching or elongation, in accordance with Dassault Service Bulletin No. 430 (21-30) dated February 16, 1972, or an FAA-approved equivalent.

(2) Inspect the weld beads and adjoining areas at the junction of the pipes, P/N's MY20-721-28-1 and MY20-721-61-1, for cracks using a magnifying glass of 5 power or greater and a dye penetrant, in accordance with Dassault Service Bulletin No. 430 (21-30) dated February 16, 1972, or an FAA-approved equivalent.

(b) Within the next 100 hours' time in service after the effective date of this AD or before the accumulation of 600 hours' time in service on an aluminum alloy air conditioning pipe, P/N MY 20-721-28-1 or MY20-721-61-1, whichever occurs later

(1) Replace the pipes, P/N's MY20-721-28-1 and MY20-721-61-1, with pipes of the same part number and thereafter continue to replace aluminum alloy pipes before the accumulation of 600 hours' time in service thereon and comply with paragraph (d); or

(2) Replace the pipes, P/N's MY 20-721-28-1 and MY20-721-61-1, with stainless steel pipes, P/N's MY20-721-28-2 and MY20-721-61-2, in accordance with Dassault Service Bulletin No. 442 (21-31) dated February 16, 1972, or an FAA-approved equivalent.

(c) If scoring or bending of the studs or stretching or elongation of the holes are found during an inspection specified in paragraph (a)(1) or cracks are found during an inspection specified in paragraph (a)(2) before further flight comply with subparagraph (1) or (2) of paragraph (b).

(d) For aluminum alloy pipes installed as replacement in accordance with subparagraph (1) of paragraph (b)

(1) Before the accumulation of 200 hours' time in service thereon, inspect in accordance with subparagraph (1) of paragraph (a); and

(2) Thereafter, inspect in accordance with subparagraph (1) of paragraph (a) at intervals not to exceed 200 hours' time in service from the last inspection.

(e) Operators who have not kept records of hours' time in service on pipes, P/N's MY20-721-28-1 and MY20-721-61-1, shall substitute airplane hours' time in service in lieu thereof.

(f) The inspections required by paragraphs (a) and (d) and the replacements specified in subparagraph (1) of paragraph (b) may be discontinued when the aluminum alloy air conditioning pipes, P/N's MY20-721-28-1 and MY20-721-61-1, are replaced with stainless steel pipes, P/N's MY20-721-28-2 and MY20-721-61-2, in accordance with Dassault Service Bulletin No. 442 (21-31), dated February 16, 1972, or an FAA-approved equivalent.

This amendment becomes effective August 15, 1973.

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