AD 90-03-19 R1

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AD Number:
90-03-19 R1
Document Type:
AD Final Rules
Docket Number:
89-CE-24-AD
Subject Heading:
Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) ...Show more
Subject:
Electrical System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
08/15/1990
Make:
M7 Aerospace LLC
Model:
SA226-AT | SA226-T | SA226-TC | SA226-T(B) | SA227-AC (C-26A) | SA227-AT | SA227-TT
Product Type:
Aircraft
Product Subtype:
Small/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Superseded AD: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Superseded By: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: 90-03-19 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   89-CE-24-AD

AMENDMENT:   39-6672

AD NUMBER:   90-03-19 R1

SUBJECT HEADING:   Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-T(B), SA226-AT, SA226-TC, SA227-TT, SA227-AT, SA227-AC Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective August 15, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
90-03-19 R1 FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation): Amendment 39-6499 as revised by 39-6672. Docket No. 89-CE-24-AD.

Applicability: Models SA226-T (Serial Numbers (S/N) T201 through T275, and T277 through T291), SA226-T(B), (S/N T(B)276 and T(B)292 through T(B)417), SA226-AT (S/N AT001 through AT074), SA226-TC (S/N TC201 through TC419), SA227-TT (S/N TT421 through TT541), SA227-AT (S/N AT423 through AT695), SA227-AC (S/N AC406, AC415, AC416, AC420 through AC705, and AC707 through AC733) airplanes certificated in any category.

Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished per AD 90-03-19.

To prevent an inadvertent deenergized battery bus relay, which could result in unrecoverable loss of the airplane's electrical power, accomplish the following:

(a) Modify the electrical system using the following procedures, or the procedures contained in Fairchild Service Bulletins SA226-24-032 and SA227-24-013, both dated August 7, 1989, as applicable:

(1) Remove the access cover of the "J-Box", EP11.

(2) Locate Battery Bus Relay K40 and remove diode from across X1 and X2 terminals.

(3) Reinstall access cover.

(4) Using the Battery Switches, verify that battery voltage is present on the LH Essential, RH Essential, and Nonessential busses.

NOTE 1: Fairchild Service Bulletins SA226-24-032 and SA227-24-013 both dated August 7, 1989, pertain to the subject of this AD.

(b) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

(c) An alternate method or adjustment of the compliance time, which provides an equivalent level of safety, may be approved by the Manager, Airplane Certification Office, Federal Aviation Administration, Fort Worth, Texas 76193-0150.

NOTE 2: The request should be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, Airplane Certification Office, Fort Worth, Texas.

All persons affected by this directive may obtain copies of the documents referred to herein upon request to the Fairchild Aircraft Corporation, P.O. Box 790490, San Antonio, Texas 78279-0490, or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106.

This AD revises AD 90-03-19, Amendment 39-6499.

This amendment (39-6672, AD 90-03-19 R1) becomes effective on August 15, 1990.

FOOTER: