AD 77-02-04

77-02-04 BEECH: Amendment 39-2813 as amended by Amendment 39-2842. Applies to the following Beech Models and Serial Numbers of airplanes if equipped with wing tip strobe lights, except those airplanes having Grimes Manufacturing Company (Grimes) P/Ns 30-1467-1, 30-1467-3, 30-1467-5, 30-0467-5, 30-0531-1 or 30-0692-1, Symbolic Displays P/Ns 701148-7-2, 30-0002, 30-0005, 30-0005A, 30-0005-1, 701303, 30-0218-1, 30-0218-2, 30-0020, or 30-0028, and Whelen Engineering Company P/Ns A429, A429PR, A429PG, A430, A450, A460, A460A, or A500 wing tip strobe lights installed.

MODELS SERIAL NUMBERS E55 and E55A TE-768 thru TE-903 A56TC TG-84 thru TG-94 58 and 58A TH-1 thru TH-302 60 and 60A P-3 thru P-222 65-B80 LD-270 thru LD-480 70 LB-1 thru LB-35 B90 and C90 LJ-318 thru LJ-502 E90 LW-1 95-B55 and 95-B55A TC-1299 thru TC-1525 100 and A100 B-1 thru B-157

Compliance: Required as indicated, unless already accomplished.

To preclude wing tip explosion, within thenext 100 hours' time in service after the effective date of this AD, accomplish the following:

1. Visually inspect the wing tip strobe lights to determine whether Grimes P/N 30-0669-1 or Hoskins P/N 30-0187-21 strobe lights or any other strobe lights other than those excepted above are installed.

2. On those airplanes having non-explosion proof strobe lights such as Grimes Manufacturing Co. P/N 30-0669-1, Hoskins P/N 30-0187-21 or strobe lights other than those excepted by this AD, deactivate the strobe light system by installing a guard over the switch, by pulling and blocking the circuit breaker so that it cannot be inadvertently reset, or by any other suitable means.

3. Systems having Grimes Manufacturing Co. P/N 30-0669-1 or Hoskins P/N 30-0187-21 strobe lights, may be reactivated upon the installation of either Grimes Manufacturing Company P/N 30-1467-1 explosion proof strobe lights in accordance with Beechcraft Service Instructions 0800-362 or later approved revisions, or upon the installation of any explosion proof strobe lights excepted by this AD.

4. Do not reactivate strobe light installations, other than those modified per Paragraph 3, until data showing that the strobe lights are explosion proof have been submitted to and approved by the Chief, Engineering and Manufacturing Branch or Division of the FAA Region issuing the original strobe light approval.

5. Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

Amendment 39-2813 became effective February 24, 1977.

This amendment 39-2842 becomes effective March 3, 1977.