75-01-03 ROCKWELL INTERNATIONAL: Amendment 39-2061. Applies to all NA- 265, NA-265-20, -30, -40, -60, -70 and -80 model airplanes, certificated in all categories.
Compliance required as indicated.
To provide temporary operating limitations on airplanes affected, pending modification of the landing gear warning system to ensure continuous functioning of the aural warning device under the conditions of CAR 4b, accomplish the following:
(1) The following operating limitation is hereby adopted effective ten days after the effective date of this AD, applicable to NA-265-60, -70 and -80 model airplanes:
"MAXIMUM TAKEOFF AND LANDING PRESSURE ALTITUDE - 8,000 FEET."
(2) For NA-265-60, -70 and -80 model airplanes, within ten days after the effective date of this AD, unless already accomplished, install a placard:
"MAXIMUM TAKEOFF AND LANDING PRESSURE ALTITUDE - 8,000 FEET. GEAR WARNING HORN MAY NOT SOUND ABOVE 125 KIAS WITH FLAPS LESS THAN 80%."
(3) For NA-265, NA-265-20, -30 and -40 model airplanes, within ten days after the effective date of this AD, unless already accomplished, install a placard:
"GEAR WARNING HORN MAY NOT SOUND ABOVE 125 KIAS WITH FLAPS LESS THAN 80%."
(4) Within 9 months after the effective date of this AD, unless already accomplished, remove and replace the altitude and airspeed switch, in accordance with Rockwell International Sabreliner Service Bulletin 74-32, dated December 18, 1974, or later FAA-approved revisions.
(5) Equivalent installations may be approved by the Chief, Aircraft Engineering Division, FAA Western Region, upon submission of adequate substantiating data.
(6) After accomplishing the work required by paragraph 4, above, or FAA-approved equivalent per paragraph 5, the operating limitation imposed by paragraph 1, above, will no longer apply and the placards specified in paragraphs 2 and 3, above, must be removed.
(7) Airplanes may be flown to a base for accomplishment of the installation required by paragraph 4, above, per FAR's 21.197 and 21.199.
This amendment becomes effective January 6, 1975.