AD 93-09-07

93-09-07 PACIFIC SCIENTIFIC COMPANY, HTL/KIN-TECH DIVISION: Amendment 39-8573. Docket 93-NM-37-AD. This AD supersedes AD 93-08-06, Amendment 39-8553.

Applicability: Fire extinguishers, as listed in Pacific Scientific Alert Service Bulletin 26A1106, dated March 10, 1993; as installed on, but not limited to, Airbus Industrie Model A300, A310, and A320 series airplanes, Boeing Model 757-200 series airplanes equipped with Rolls Royce engines, and McDonnell Douglas Model DC-9-80 (MD-80) and MD-11 series airplanes, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent failure of a fire extinguisher to discharge extinguishant in the event of a fire, accomplish the following:

(a) Prior to the accumulation of 500 hours time-in-service or within 60 days after the effective date of this AD, whichever occurs first, unless accomplished within the last 8 months prior to the effective date of this AD, perform a test ofthe low pressure indicating circuit to monitor actuation of the pressure switch on the fire extinguisher in accordance with the Accomplishment Instructions in Pacific Scientific Alert Service Bulletin 26A1106, dated March 10, 1993.

(1) If the switch passes the test, no further action is required by this AD.

(2) If the switch fails this test, prior to further flight, replace the fire extinguisher with a serviceable extinguisher. This replacement extinguisher must have been inspected previously in accordance with paragraph 3 of the Accomplishment Instructions in the service bulletin.

(b) As of the effective date of this AD, no person shall install, on any airplane, a Pacific Scientific fire extinguisher having a part number listed in Pacific Scientific Alert Service Bulletin 26A1106, dated March 10, 1993, that has not been inspected previously in accordance with paragraph 3 of the Accomplishment Instructions in Pacific Scientific Alert Service Bulletin 26A1106, dated March 10, 1993.

(c) For switches that fail to pass the test required by paragraph (a) of this AD: Within 30 days after accomplishing the test, submit a report of the results of the test to the FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California 90806-2425; or fax to (310) 988-5210. The report must include the following information:

(1) When was the inspection performed?

(2) What is the part number of the fire extinguisher?

(3) What is the airplane model and series from which the extinguisher was removed?

(4) Where was the extinguisher installed (e.g., Position/Location: left engine, right engine, auxiliary power unit (APU) compartment, etc.)?

(5) When was the last hydrostatic check performed on that extinguisher?

(6) Who performed the last hydrostatic check on that extinguisher?

(7) When was the last hex key check (low pressure indicating circuit test) performed onthat extinguisher?

(8) Was the extinguisher guard tack welded, completely welded, or not welded to the switch housing? The information collection requirements contained in this regulation have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and have been assigned OMB Control Number 2120-0056.

(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, Los Angeles Aircraft Certification Office (ACO), 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, Los Angeles ACO.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO.

(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 testing and replacement shall be done in accordance with Pacific Scientific Alert Service Bulletin 26A1106, dated March 10, 1993. This incorporation by reference was approved previously by the Director of the Federal Register, in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51, as of May 11, 1993 (58 FR 21912, April 26, 1993). Copies may be obtained from Pacific Scientific Company, HTL/Kin-Tech Division, Attention: Product Support Department, 1800 Highland Avenue, Duarte, California 91010. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California 90806-2425; or at the Office of the Federal Register, 800 North Capitol Street,NW., suite 700, Washington, DC.

This AD supersedes AD 93-08-06, Amendment 39-8553.

(g) This amendment is effective May 11, 1993.