AD 69-06-05

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AD Number:
69-06-05
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Airplanes
Subject:
Inverter
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
04/15/1969
Make:
Maryland Air Industries, Inc.
Model:
F-27 | F-27A | F-27B | F-27F | F-27G | F-27J | F-27M | FH-227 | FH-227B | FH-227C | FH-227D | FH-227E
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Superseded AD: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Superseded By: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: 69-06-05
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-737

AD NUMBER:   69-06-05

SUBJECT HEADING:   Airworthiness Directives; Fairchild-Hiller Model F-27 and FH-227 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective April 15, 1969.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
69-06-05 FAIRCHILD-HILLER: Amdt. 39-737. Applies to F-27 and FH-227 Type Airplanes Incorporating Lear Siegler (Jack & Heintz) Inverters P/N F35-5 or P/N F45-10 or P/N 40045-000 with Solid State Regulators Lear Siegler Kit P/N 52-000054 (Regulator P/N 51502-000), or Kit P/N 52-000059 (Regulator P/N 51502-001), or Kit P/N 52-000068 (Regulator P/N 51502-00M), or Bendix Type 4B39 Series Regulators.

Compliance required within the next 1200 hours time in service after the effective date of this AD unless already accomplished.

To prevent hazards associated with an inverter overvoltage condition causing the burnout or erratic operation of required instruments, accomplish the following:

(a) Install a.c. overvoltage protection in the electrical output of the above inverter(s) which utilize Lear Siegler solid state regulators, P/N 51502-000, or P/N 51502-001, or P/N 51502-00M, in accordance with Lear Siegler Service Bulletin No. 148-1 dated February 7, 1969, or F-27 aircraft and FH-227 aircraft or later FAA approved revision approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, or equivalent installation approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

(b) Install a.c. overvoltage protection in the electrical output of the above inverter(s) which utilize Bendix 4B39 Series regulators in accordance with Bendix Service Bulletin No. R220 dated November 15, 1968, or later FAA-approved revision approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, or equivalent installation, approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

(c) Upon request with substantiating data, submitted through an FAA maintenance inspector, the compliance time specified in this AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

This amendment is effective April 15, 1969.

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