AD 81-25-04 R1

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AD Number:
81-25-04 R1
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes
Subject:
Electrical Wiring Inspection
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
01/21/1982
Make:
Mitsubishi Heavy Industries, Ltd.
Model:
MU-2B-25 | MU-2B-26 | MU-2B-26A | MU-2B-35 | MU-2B-36A | MU-2B-40 | MU-2B-60
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Superseded AD: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Superseded By: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:
AIRWORTHINESS DIRECTIVES FINAL RULES: 81-25-04 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4300

AD NUMBER:   81-25-04 R1

SUBJECT HEADING:   Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective January 21, 1982.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   81-25-04 R1 MITSUBISHI AIRCRAFT INTERNATIONAL, INC. (MAI): Amendment 39- 4274 as amended by amendment 39-4300. Applies to MAI Models MU-2B-25/-26/-26A/-40, serial numbers 313SA, 321SA, 348SA through 453SA, Models MU-2B-35/-36A/-60, serial numbers 652SA, 661SA, 697SA through 799SA, 1501SA through 1538SA, and 1540SA.

Compliance is required as indicated unless previously accomplished.

Within the next 25 hours' time in service from the effective date of this AD:
1. Visually inspect the engine's electrical wiring to determine if nonshielded and noncolor coded wiring is white or brown (tan). Inspection may be made at connectors P4001 and P4020. Remove spiral wrap as required for inspection.

2. If wires are brown (tan) inspect in accordance with Figure 1 (one) to determine if wires are "tight weave" or "loose weave."
a. If brown (tan) wires are "loose weave," inspect in accordance with paragraph 4.
b. If brown (tan) wires are "tight weave," no further inspection is necessary and the airplane may be returned to service.

3. If wires are white, open the harness as necessary and inspect wires for identification:
a. If white wires are marked MS 25471-XX (XX indicates wire gauge), inspect in accordance with paragraph 4.
b. If white wires are marked M 22759/5-XX, no further inspection is necessary and the airplane may be returned to service.

4. After each 25 hours' time in service, remove wiring harness which incorporates wires affected by paragraph 2a or 3a from the engines and visually inspect all brown (tan) "loose weave" or white insulated MS 25471-XX wires for tight loop, kinks, or bulged deformation. If these conditions are found, replace the wiring harness using one of the procedures in paragraph 5 before further flight. Inspections may be discontinued when wires are replaced using one of the procedures in paragraph 5.

5. Before 300 hours' time in service, after the effective date of this AD, replace all brown (tan) "loose weave" or white insulated MS 25471-XX wires with M 22759/8-XX wire using one of the procedures specified in Part 3 of MAI S/B SB036/71-003, Revision A, or alternate means approved by the Chief, Aircraft Certification Division, Southwest Region, Federal Aviation Administration.

A special flight permit may be issued in accordance with FAR 21.197 to allow flight of the airplane to a location where this AD can be accomplished.

Amendment 39-4274 became effective December 10, 1981.
This amendment 39-4300 becomes effective January 21, 1982.



AD 81-25-04


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