AD 82-06-10

82-06-10 CESSNA: Amendment 39-4363. Applies to Models 210L/T210L (S/Ns 21059810, 21059819 thru 21061573), 210M/T210M (S/Ns 21061574 thru 21062954), 210N/T210N (S/Ns 21062955 thru 21064535) and P210N (S/Ns P21000001 thru P21000760) airplanes equipped with Airborne Model 442CW-8 (Cessna P/N C431004-0102) vacuum pump, pneumatic deicer boots and vacuum operated attitude indicator.

COMPLIANCE: Required as indicated, unless already accomplished.

To prevent loss of vacuum-driven-attitude instruments resulting from failure of the single Airborne Model 442CW-8 (Cessna P/N C431004-0102) vacuum pump during flight in IFR conditions, before further flight, accomplish the following:

A) Remove approval for IFR operations by:

1. Installing a temporary placard on the instrument panel in full view of the pilot, which reads in letters at least 1/8-inch high "APPROVED FOR DAY-NIGHT-VFR OPERATIONS" and operate the airplane in accordance with this limitation.

2. Covering theabbreviation "IFR" on the types of operation placard and on the facsimile of this placard in the applicable Airplane Manual, Pilot's Operating Handbook or Information Manual with opaque tape or equivalent.

B) The requirements of Paragraph A) of this AD are no longer applicable when:

1. An attitude indicator powered by an independent power source is installed, or

2. Cessna Service Alert Letter SE82-13 has been incorporated or,

3. Cessna P/N C431003-0102 (Airborne) or C431003-0302 (Edo-Aire, P/N 1U128-001 or -003) pump is installed replacing the C431004-0102 (Airborne Model 442CW-8) pump. The PN C4310O3-0102 or -0302 pump may be installed as follows:

a. Bolt the pump on the pad vacated by the P/N C431004-0102 pump.

b. Remove fittings from P/N C431004-0102 pump and install fittings in the P/N C431003-0l02 or -0302 pump.

c. Reconnect the vacuum hose to the pump suction port.

d. Remove the pressure hose from the pump leading to the deicepressure valve mounted on the firewall. (Cover the valve inlet to exclude foreign objects.)

e. On those aircraft approved for flight into known icing, cover the words, "This airplane is approved for flight into icing conditions if the proper optional equipment is installed and operational," on the types of operation placard and on the facsimile of this placard in the applicable Airplane Flight Manual, Pilots Operating Handbook or Information Manual with opaque tape or equivalent.

f. Install a temporary placard on the instrument panel in the vicinity of the De-Ice Press switch in full view of the pilot which reads in letters at least 1/8-inch high "WING/TAIL BOOTS INOP."

C) Paragraph A) of this AD may be accomplished by the holder of at least a private pilot certificate issued under Part 61 of the Federal Aviation Regulations on any airplane owned or operated by that person. This person must make the prescribed entry in the aircraft maintenance records, including those airplanes on which it has already been accomplished, indicating compliance with this AD.

D) Any equivalent method of compliance with this Airworthiness Directive, if used, must be approved by the Chief, Wichita Aircraft Certification Office, FAA, Room 238, Terminal Building 2299, Mid-Continent Airport, Wichita, Kansas, telephone (316) 269-7000.

This Amendment 39-4363 becomes effective on April 15, 1982, to all persons except those to whom it has already been made effective by an airmail letter from the FAA dated March 12, 1982, and is identified as AD 82-06-10.