AD 78-23-07

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AD Number:
78-23-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Hiller Models UH-12D, UH-12E, and UH-12E (4 Place) Helicopters
Subject:
Finite Life Components Listed in AD
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/14/1978
Make:
Hiller Aviation | Siam Hiller Holdings, Inc.
Model:
UH-12D | UH-12E
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Superseded AD: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Superseded By: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: 78-23-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3344

AD NUMBER:   78-23-07

SUBJECT HEADING:   Airworthiness Directives; Hiller Models UH-12D, UH-12E, and UH-12E (4 Place) Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective December 14, 1978.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
78-23-07 HILLER HELICOPTERS: Amendment 39-3344. Applies to Hiller Model UH-12D, UH-12E and UH-12E (4 Place) helicopters certificated in all categories, including Military Models UH-23D, OH-23G, H-23F and turbine-powered models, equipped with the finite life components listed below:

PART NO.
	
NOMENCLATURE
	
REPLACEMENT PERIOD
	
APPLICABILITY


63192-7, -11
	
Snubber Assy., engine, longitudinal
	
4,650 hrs
	
Note A


63192-5, -9
	
Snubber Assy., engine, lateral
	
4,650 hrs
	
All


63197
	
Bracket, engine snubber
	
6,160 hrs
	
All


63197-5
	
Bracket, engine snubber
	
9,850 hrs
	
All


31197-3
	
Flyweight collective pitch ballast
	
2,500 hrs
	
All


31318
	
Bellcrank, collective control
	
15,000 hrs
	
Note B


31319-3
	
Tube, collective control
	
23,500 hrs
	
Note B


31321
	
Shaft, dual collective control
	
10,400 hrs
	
Note B


31344, -3, -5, or -9
	
Block Assy., collective stick
	
6,400 hrs
	
Note B


31403
	
Arm Assy., collective and throttle controls
	
21,500 hrs
	
E (4 place)


34141, -5
	
Scissor, cyclic control, lower
	
275 hrs
	
All


AN3-7A
	
Attaching bolts, engine snubber (used to attach P/N 63197 bracket to deck and lord mount)
	
600 hrs
	
All

Note A - All models except turbine-powered.
Note B - All models except UH-12D and UH-23D.

To prevent failure of the above listed finite life components accomplish the following:

(a) Within fifty (50) hours time in service after the effective date of this AD, unless already accomplished, inspect the service history of each of the finite life components listed in this AD for adequacy of documentation.

NOTE: The finite life components may be documented by serial number, part nomenclature, part number or any combination.

(b) For those finite life components listed in this AD for which service history can be documented, no further action is required by this AD.

(c) For any finite life component listed in this AD for which service history cannot be documented:

(1) Prior to further flight, remove and replace those finite life components whose replacement period is less than helicopter total time in service.

(2) Within five hundred (500) hours time in service from the effective date of this AD, remove and replace those components whose replacement period is greater than helicopter total time in service.

NOTE: The Criteria in (c), (1) and (2) applies to aircraft in service. Finite life criteria for aircraft submitted for original airworthiness certification are contained in AC-21-13.

(d) Only finite life components for which prior service history or representation as new can be documented may be used as replacement parts. Equivalent inspection procedures may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region.

This amendment becomes effective December 14, 1978.

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