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 Federal Register Information
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
Docket No. 94-NM-82-AD; Amendment 39-8950; AD 94-13-09
Airworthiness Directives; DASSAULT AVIATION Model Mystere Falcon 900 Series Airplanes
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Preamble Information
AGENCY: Federal Aviation Administration, DOT
DATES: Effective July 12, 1994.
Regulatory Information
94-13-09 DASSAULT AVIATION: Amendment 39-8950. Docket 94-NM-82-AD.
Applicability: All Model Mystere Falcon 900 series airplanes, certificated in any category.
Compliance: Required as indicated, unless accomplished previously.
To prevent inability of the nose landing gear (NLG) to extend (deploy) fully due to recompression of the NLG shock absorber, accomplish the following:
(a) Within 7 days after the effective date of this AD, accomplish either paragraph (a)(1) or (a)(2) of this AD in accordance with Dassault Aviation Service Bulletin F900-A149 (F900-A32-11), dated April 13, 1994:
(1) Perform a pressure check of the low pressure chamber of the NLG shock absorber to determine if its charging operation is within the limits specified in the Airplane Maintenance Manual (AMM). Perform the pressure check in accordance with procedures described in the service bulletin.
(i) If the charging operation is within the limits specified in the AMM, repeat the pressure check at intervals not to exceed 7 days, until the installation required by paragraph (b) of this AD is accomplished.
(ii) If the charging operation is outside the limits specified in the AMM, prior to further flight, recharge the shock absorber in accordance with procedures described in the AMM. Thereafter, repeat the pressure check at intervals not to exceed 7 days, until the installation required by paragraph (b) of this AD is accomplished.
(2) Perform a torque check of the nose wheel steering to determine if the charging operation of the NLG shock absorber is within the limits specified in the service bulletin. Perform the torque check in accordance with procedures described in the service bulletin.
(i) If the average load computed is greater than or equal to 130 ft. lbs. (18 mdaN), repeat the torque check at intervals not to exceed 7 days, until the installation required by paragraph (b) of this AD is accomplished.
(ii) If the average load computed is greater than 87 ft. lbs., but less than 130 ft. lbs., (12 to 18 mdaN), within 3 landings or 7 days after performing the torque check, whichever occurs later, recharge the shock absorber in accordance with the service bulletin. Flights on which the landing gear will be retracted are authorized. Thereafter, repeat the torque check at intervals not to exceed 7 days, until the installation required by paragraph (b) of this AD is accomplished.
(iii) If the average load computed is less than or equal to 87 ft. lbs. (12 mdaN), prior to further flight, recharge the shock absorber in accordance with service bulletin. Thereafter, repeat the torque check at intervals not to exceed 7 days, until the installation required by paragraph (b) of this AD is accomplished.
(b) Within 30 days after the effective date of this AD, install a relay in the right side of the electrical rack in accordance with Dassault Aviation Service Bulletin F900-150 (F900-32-12), dated May 9, 1994. Accomplishment of this installation constitutes terminating action for both the pressure checks and the torque checks required by paragraph (a) of this AD.
(c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished.
(d) The checks and recharging shall be done in accordance with Dassault Aviation Service Bulletin F900-A149 (F900-A32-11), dated April 13, 1994. The installation shall be done in accordance with Dassault Aviation Service Bulletin F900-150 (F900-32-12), dated May 9, 1994. The incorporation by reference of these documents were 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 Dassault International, Inc., P.O. Box 624, Paramus, New Jersey 07653-9925. 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.
(e) This amendment becomes effective on July 12, 1994.
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