AD 77-13-06

AD Final Rules - DRS_77-13-06.html
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AD Number:
77-13-06
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Pilatus Model PC-6 Airplanes (all variants); Fairchild Hiller Model PC-6 Airplanes
Subject:
Landing Flaps
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/25/1977
Make:
Pilatus Aircraft Limited
Model:
PC-6 | PC-6-H1 | PC-6-H2 | PC-6/350 | PC-6/350-H1 | PC-6/350-H2 | PC-6/A | PC-6/A-H1 | PC-6/A-H2 | P...Show more
Product Type:
Aircraft
Product Subtype:
Small Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
Updated RGL applicability to match AD applicability; CAR C-11-185
AIRWORTHINESS DIRECTIVES FINAL RULES: 77-13-06
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2928

AD NUMBER:   77-13-06

SUBJECT HEADING:   Airworthiness Directives; Pilatus Model PC-6 Airplanes (all variants); Fairchild Hiller Model PC-6 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 25, 1977.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   77-13-06 PILATUS AIRCRAFT LTD. AND FAIRCHILD HILLER: Amendment 39- 2928. Applies to Pilatus Model PC-6 airplanes (all variants) with serial numbers up through 743 and Fairchild Hiller Model PC-6 airplanes, serial numbers 2001 through 2019, 2021 through 2038, and 2040 through 2049, certificated in all categories.
Compliance is required as indicated.
To prevent a possible landing flap nose rib fatigue failure, accomplish the following:
(a) Within the next 25 hours time in service after the effective date of this AD, unless already accomplished within the last 25 hours time in service, and, thereafter, at intervals not to exceed 100 hours time in service since the last inspection, visually inspect all the end ribs of the landing flaps for cracks in accordance with Pilatus Service Bulletin No. 124, paragraph 2.1, dated January 1976, or an FAA-approved equivalent.
(b) If a crack is found during any inspection required by paragraph (a) of this AD, before further flight, repair the crack in accordance with paragraphs 2.1 and 2.2 of Pilatus Service Bulletin No. 124, dated January 1976, or an FAA-approved equivalent.
(c) Within the next 1,000 hours time-in-service after the effective date of this AD, unless already accomplished, reinforce the landing flap nose end ribs in accordance with paragraph 2.3 of Pilatus Service Bulletin No. 124, dated January 1976, or an FAA-approved equivalent.
(d) The repetitive inspections required by paragraph (a) of this AD may be discontinued after the reinforcement has been accomplished in accordance with paragraph (c) of this AD, and all cracks have been repaired in accordance with paragraph (b) of this AD.
(Fairchild Hiller Service Bulletin PC-6-51-3 pertains to this same subject.)
This amendment becomes effective July 25, 1977.

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