AD 71-08-02

71-08-02 MCDONNELL DOUGLAS: Amend 39-1189 as amended by amendment 39-1346. Applies to DC-9 airplanes certificated in all categories.

Compliance required within the next 50 hours' time in service after effective date of this AD, unless already accomplished.

To ensure pilot control of speed brake retraction and to prevent inflight deployment of ground spoilers, accomplish one of the following:

1. Affix a placard(s) in the cockpit in plain view of both crew members stating:

DO NOT EXTEND GEAR WITH SPEED BRAKES DEPLOYED

DO NOT ARM GROUND SPOILERS PRIOR TO GEAR EXTENSION

2. a. Install the interlock switch per McDonnell Douglas DC-9 Service Bulletin No. 32-128, dated November 17, 1971, or later FAA approved revisions, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region and

b. Amend the Limitations Section, FAA Approved Airplane Flight Manual, to include the statements:

Do not extend gear withspeed brakes deployed.

Do not arm ground spoilers prior to gear extension.

NOTE: Placards previously installed per Step 1. may be removed if step 2 is accomplished.

Amendment 39-1189 became effective April 13, 1971.

This amendment 39-1346 becomes effective November 30, 1971.