AD 70-09-05

AD Final Rules - DRS_70-09-05.html
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AD Number:
70-09-05
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Sikorsky Models HRS-1/CH-19, HRS-3/H-19B, H-19D, and H-19G Helicopters
Subject:
Main Rotor Shaft
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
04/30/1970
Make:
Orlando Helicopter Airways, Inc.
Model:
H-19D | H-19G | HRS-1/CH-19 | HRS-3/H-19B
Product Type:
Aircraft
Product Subtype:
Rotorcraft
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 70-09-05
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-978

AD NUMBER:   70-09-05

SUBJECT HEADING:   Airworthiness Directives; Sikorsky Models HRS-1/CH-19, HRS-3/H-19B, H-19D, and H-19G Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective April 30, 1970.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   70-09-05 SIKORSKY: Amdt. 39-978. Applies to Orlando Helicopters Airways, Inc. Models HRS-1/CH-19, HRS-3/H-19B, H-19D, H-19G helicopters certificated in all categories.

Compliance required within the next 15 hours' time in service after the effective date of this airworthiness directive, unless already accomplished.

To prevent failure of the main rotor shaft due to fatigue cracks originating from surface defects, accomplish the following:

(a) Inspect main rotor shaft P/N S14-35-4308-1, -2, -3, or -4 for cracks and surface defects in accordance with Sikorsky Service Bulletin No. 55B35-3 dated April 3, 1970, or later FAA approved revision or an equivalent inspection procedure approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region.

(b) Main rotor shafts exhibiting crack indications, or unsalvageable surface defects, shall be retired from service prior to further flight and replaced with a shaft which has been inspected in accordance with paragraph (a).

(c) Main rotor shafts found with salvageable surface defects may be reworked in accordance with Sikorsky Service Bulletin No. 55B35-3 dated April 3, 1970, or later FAA approved revision, or an equivalent rework procedure approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region. Should the extent of rework necessitate removal of the shaft from the main gear box, then the replacement shaft must be inspected in accordance with paragraph (a).

(d) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Southern Region may adjust the compliance time specified in this airworthiness directive if the request contains substantiating data to justify the increase for that operator.

This amendment becomes effective April 30, 1970.

FOOTER: