92-17-06 BRITISH AEROSPACE: Amendment 39-8335. Docket No. 92-NM-63-AD.
Applicability: Model BAC 1-11-200 and -400 airplanes, certificated in any category.
Compliance: Required as indicated, unless accomplished previously.
To prevent reduced structural integrity of the fuselage pressure vessel, accomplish the following:
(a) For airplanes operated up to a maximum cabin pressure differential of 7.5 pounds per square inch, accomplish the following in accordance with British Aerospace Alert Service Bulletin 53-A-PM5989, Issue No. 1, dated October 3, 1991:
(1) For airplanes not having modification PM51 installed: Prior to the accumulation of 20,000 landings, or within 1,000 landings after the effective date of this AD, whichever occurs later; and thereafter at intervals specified below; perform a close visual, dye penetrant, or eddy current inspection to detect cracks in the top and bottom corners of the passenger and service door apertures, in accordance withthe service bulletin.
(i) If the immediately preceding inspection was performed using a close visual inspection technique, the next inspection must be performed within 1,600 landings, in accordance with the service bulletin.
(ii) If the immediately preceding inspection was performed using a dye penetrant technique, the next inspection must be performed within 3,200 landings, in accordance with the service bulletin.
(iii) If the immediately preceding inspection was performed using an eddy current technique, the next inspection must be performed within 5,000 landings, in accordance with the service bulletin.
(2) For airplanes having modification PM51 installed: Prior to the accumulation of 30,000 landings, or within 1,200 landings after the effective date of this AD, whichever occurs later; and thereafter at intervals specified below; perform a close visual inspection, dye penetrant, or eddy current inspection to detect cracks in the top and bottom corners of the passenger and service door apertures, in accordance with the service bulletin.
(i) If the immediately preceding inspection was performed using a close visual inspection technique, the next inspection must be performed within 1,600 landings, in accordance with the service bulletin.
(ii) If the immediately preceding inspection was performed using a dye penetrant technique, the next inspection must be performed within 3,200 landings, in accordance with the service bulletin.
(iii) If the immediately preceding inspection was performed using an eddy current technique, the next inspection must be performed within 5,000 landings, in accordance with the service bulletin.
(3) For airplanes repaired in accordance with Structural Repair Manual Chapter 53-02-0, Figure 74: Prior to the accumulation of 20,000 landings (for airplanes not having modification PM51 installed), or prior to the accumulation of 30,000 landings (for airplanes having modification PM51 installed), from the date of installation of the repair; or within 1,000 landings after the effective date of this AD, whichever occurs later; and thereafter at intervals specified below; perform a close visual inspection, dye penetrant, or eddy current inspection to detect cracks of the fuselage skin repair plates at the passenger and service door apertures, in accordance with the service bulletin.
(i) If the immediately preceding inspection was performed using a close visual inspection technique, the next inspection must be performed within 1,600 landings, in accordance with the service bulletin.
(ii) If the immediately preceding inspection was performed using a dye penetrant technique, the next inspection must be performed within 3,200 landings, in accordance with the service bulletin.
(iii) If the immediately preceding inspection was performed using an eddy current technique, the next inspection must be performed within 5,000 landings, in accordance with the service bulletin.
(b) For airplanes operated at a cabin pressure differential in excess of 7.5 pounds per square inch, but not exceeding 8.2 pounds per square inch, accomplish the following in accordance with British Aerospace Alert Service Bulletin 53-A-PM5989, Issue No. 1, dated October 3, 1991:
(1) For airplanes not having modification PM51 installed: Prior to the accumulation of 14,000 landings, or within 1,000 landings after the effective date of this AD, whichever occurs later; and thereafter at intervals specified below; perform a close visual inspection, dye penetrant, or eddy current inspection to detect cracks in the top and bottom corners of the passenger and service door apertures, in accordance with the service bulletin.
(i) If the immediately preceding inspection was performed using a close visual inspection technique, the next inspection must be performed within 1,100 landings, in accordance with the service bulletin.
(ii) If theimmediately preceding inspection was performed using a dye penetrant technique, the next inspection must be performed within 2,250 landings, in accordance with the service bulletin.
(iii) If the immediately preceding inspection was performed using an eddy current technique, the next inspection must be performed within 3,500 landings, in accordance with the service bulletin.
(2) For airplanes having modification PM51 installed: Prior to the accumulation of 20,000 landings, or within 1,000 landings after the effective date of this AD, whichever occurs later; and thereafter at intervals specified below; perform a close visual, dye penetrant, or eddy current inspection to detect cracks in the top and bottom corners of the passenger and service door apertures, in accordance with the service bulletin.
(i) If the immediately preceding inspection was performed using a close visual inspection technique, the next inspection must be performed within 1,100 landings, in accordance with the service bulletin.
(ii) If the immediately preceding inspection was performed using a dye penetrant technique, the next inspection must be performed within 2,250 landings, in accordance with the service bulletin.
(iii) If the immediately preceding inspection was performed using an eddy current technique, the next inspection must be performed within 3,500 landings, in accordance with the service bulletin.
(3) For airplanes repaired in accordance with Structural Repair Manual Chapter 53-02-0, Figure 74: Prior to the accumulation of 10,000 landings (for airplanes not having modification PM51 installed), or prior to the accumulation of 15,000 landings (for airplanes having modification PM51 installed), from the date of installation of the repair; or within 500 landings after the effective date of this AD, whichever occurs later; and thereafter at intervals specified below; perform a close visual, dye penetrant, or eddy current inspection to detect cracks of the fuselage skin repair plates at the passenger and service door apertures, in accordance with the service bulletin.
(i) If the immediately preceding inspection was performed using a close visual inspection technique, the next inspection must be performed within 1,100 landings, in accordance with the service bulletin.
(ii) If the immediately preceding inspection was performed using a dye penetrant technique, the next inspection must be performed within 2,250 landings, in accordance with the service bulletin.
(iii) If the immediately preceding inspection was performed using an eddy current technique, the next inspection must be performed within 3,500 landings, in accordance with the service bulletin.
(c) If cracks are found as a result of any inspection required by paragraphs (a) or (b) of this AD, prior to further flight, repair any cracks found; and inspect the door surround structure for associated damage, and, prior to further flight, repair any damage found; in accordance with British Aerospace Alert Service Bulletin 53-A-PM5989, Issue No. 1, dated October 3, 1991.
(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.
NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch.
(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 repair shall be done in accordance with British Aerospace Alert Service Bulletin53-A-PM5989, Issue No. 1, dated October 3, 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 British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, DC 20041-0414. 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., 7th Floor, Suite 700, Washington, DC.
(g) This amendment becomes effective on September 29, 1992.