AD 93-18-04 SUPERSEDED

93-18-04 AEROSPATIALE: Amendment 39-8689. Docket 93-NM-47-AD.

Applicability: Model ATR42-300 and ATR42-320 series airplanes, certificated in any category, and having the following serial numbers:

005 through 016, inclusive;
018 through 030, inclusive;
032 through 036, inclusive;
038;
040;
042;
043;
048 through 062, inclusive;
064 through 090, inclusive;
092 through 094, inclusive; and
096 through 228, inclusive.

Compliance: Required as indicated, unless accomplished previously.

To prevent loss of strength of the fuselage frames, accomplish the following:

(a) Prior to the accumulation of 18,000 total landings, or within 100 landings after the effective date of this AD, whichever occurs later, conduct a general visual inspection of fuselage frames 25 and 27 to verify the proper installation of a rivet in each of the key holes, in accordance with Aerospatiale Service Bulletin ATR42-53-0070, dated June 10, 1991; Revision 1, dated June 12,1992; or Revision 2, dated March 22, 1993.

(b) If a rivet is installed in each of the key holes, no further action is required by this AD.

(c) If a rivet is not installed in a key hole, prior to further flight, perform an eddy current inspection of the open key hole to detect cracks, in accordance with the service bulletin.

(1) If no cracks are found as a result of the eddy current inspection, prior to further flight, install a rivet in the open key hole in accordance with the service bulletin. After such installation, no further action is required by this AD.

(2) If cracks are found as a result of the eddy current inspection, prior to further flight, repair the cracks in accordance with a method approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.

(d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.

(e) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.

(f) The inspections and installation shall be done in accordance with the following Aerospatiale service bulletins, which contain the specified effective pages:

Service Bulletin
Referenced and Date

Page Number
Revision Level
Shown on Page
Date
Shown on Page
ATR42-53-0070
(Original)
June 10, 1991
1-13
Original
June 10, 1991
ATR42-53-0070
Revision 1
June 12, 1992
1-7,9-12

8
1

Original
June 12, 1992

June 10, 1991
ATR42-53-0070
Revision 2
March 22, 1993
1-2, 9-10
3-7, 11-12
8
2
1
Original
March 22, 1993
June 12, 1992
June 10, 1991

This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Aerospatiale, 316 Route de Bayonne, 31060 Toulouse, Cedex 03, France. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

(g) This amendment becomes effective on November 18, 1993.