AD 76-07-06

76-07-06 MCDONNELL DOUGLAS: Amendment 39-2567 is amended by Amendment 39-2717. Applies to DC-10-10, -10F, -30, -30F and -40 Series airplanes, certificated in all categories.

To assure automatic disarming in the event of inadvertent deployment of the spoilers during take-off, accomplish either (a) and (b), or (c) below:

(a) Within seven days after effective date of this AD, unless already accomplished, install an appropriate placard, as indicated below, in plain view of the pilots:

(1) For airplanes equipped with CF6-6D or CF6-6D1 engines: 'DO NOT ARM SPOILERS FOR TAKE-OFF IF OUTSIDE AIR TEMPERATURE IS BELOW -13 degrees C (FOR DERATED THRUST TAKE-OFF) OR BELOW -28 degrees C (FOR FULL THRUST TAKE-OFF).'

(2) For airplanes equipped with CF6-50A, CF6-50C or CF6-50H engines: 'DO NOT ARM SPOILERS FOR TAKE-OFF IF OUTSIDE AIR TEMPERATURE IS BELOW -25 degrees C (FOR DERATED THRUST TAKE-OFF) OR BELOW -31 degrees C (FOR FULL THRUST TAKE-OFF).'

(3) For airplanesequipped with JT9D-20 engines: "DO NOT ARM SPOILERS FOR TAKE-OFF IF OUTSIDE AIR TEMPERATURE IS BELOW +5 degrees C (FOR DERATED THRUST TAKE-OFF) OR BELOW -11 degrees C (FOR FULL THRUST TAKE-OFF).'

Above required placard may be removed when "(b)" below is accomplished.

(b) Within sixty days after the effective date of this AD, if autospoilers are not de-activated per (c) below, incorporate the following limitations in the appropriate FAA Approved Airplane Flight Manual (AFM), under the heading GROUND SPOILERS:

(1) In AFM Limitations Section, Report No. MDC-J1010: 'DO NOT ARM SPOILERS FOR TAKE-OFF IF OUTSIDE AIR TEMPERATURE IS BELOW -13 degrees C (FOR DERATED THRUST TAKE-OFF), OR BELOW -28 degrees C (FOR FULL THRUST TAKE-OFF).'

(2) In AFM Limitations Section, Report No. MDC-J1030 and MDC-J5830: 'DO NOT ARM SPOILERS FOR TAKE-OFF IF OUTSIDE AIR TEMPERATURE IS BELOW -25 degrees C (FOR DERATED THRUST TAKE-OFF) OR BELOW -31 degrees C (FOR FULL THRUST TAKE-OFF).'(3) In AFM Limitations Section, Report No. MDC-J1040: 'DO NOT ARM SPOILERS FOR TAKE-OFF IF OUTSIDE AIR TEMPERATURE IS BELOW +5 degrees C (FOR DERATED THRUST TAKE-OFF) OR BELOW -11 degrees C (FOR FULL THRUST TAKE-OFF).'

(c) Within seven days after the effective date of this AD, deactivate and placard the auto-spoilers inoperative per McDonnell Douglas AOL 10-108 Rev. "C", or later FAA-approved revision.

(d) The limitations required by paragraphs (a) and (b) and the placard required by paragraph (c) may be removed and the auto-spoilers system may be reactivated after all ground spoiler knockdown cam assemblies on applicable airplanes in an operator's fleet have been replaced in accordance with McDonnell Douglas Service Bulletin 27-147 dated July 16, 1976 or later FAA approved revisions or production equivalents approved by the Chief, Aircraft Engineering Division, FAA Western Region.

Equivalent placards, modifications, or AFM pages may be approved by the Chief, AircraftEngineering Division, FAA Western Region.

Amendment 39-2567 was effective April 10, 1976 for all persons except those to whom it was made effective by telegrams, dated March 16, 1976, which contained this amendment.

This amendment 39-2717 becomes effective September 30, 1976.