87-04-05 TELEDYNE CONTINENTAL MOTORS: Amendment 39-6074. Final copy of priority letter AD issued February 12, 1987. Applies to GTSIO-520-N Series Engines equipped with rotary fuel pump, P/N 643367 or 643367A2, manufactured by Lear Siegler Romec.
Compliance is required within the next 10 flight hours, after the effective date of this AD, unless already accomplished. To prevent possible fuel pump leaks, fluctuating fuel flow, engine failure, and/or engine compartment fire; notwithstanding prior accomplishment of the referenced service bulletins, accomplish the following:
For all GTSIO-520-N series engines:
(a) Visually inspect the attaching screws on the regulator valve cover of fuel pump, P/N 643367 or 643367A2, for blue or green paint markings on the head of at least one screw.
(b) If paint markings are present, proper torque has been assured by the manufacturer. Therefore, make appropriate Engine Logbook entry; no further action is required.
(c) If paint markings are not present; accomplish the following:
(1) Cut and remove the safety wire from the four attaching screws on the regulator valve cover of fuel pump, P/N 643367 or 643367A2.
(2) Loosen screws one full turn.
(3) Tighten the four screws to 24-27 inch pounds.
(4) Safety wire the four screws with MS20995C32 wire.
(5) Make appropriate Engine Logbook entry.
NOTE: Lear Siegler, Inc., Service Bulletin No. 101SB015, dated December 17, 1986, and Teledyne Continental Motors Service Bulletin No. M87-6, dated February 6, 1987, address this subject.
(d) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished.
(e) Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Atlanta Aircraft Certification Office, Federal Aviation Administration, 1669 Phoenix Parkway, Suite 210, Atlanta, Georgia 30349.
This amendment, 39-6074, becomes effective December 1, 1988, as to all persons except those persons to whom it was made immediately effective by priority letter AD, 87-04-05, issued February 12, 1987, which contained this amendment.