AD 74-24-03

74-24-03 BEECH: Amendment 39-2016. Applies to the following models and serial numbered airplanes if equipped with either Grimes P/N 30-0467-1 or Grimes P/N 30-0467-3 strobe light assemblies:

F33A, Serials CE-436 through CE-537 V35B, Serials D-9468 through D-9692 A36, Serials E-424 through E-603, E-605 through E-607 95-B55 and 95-B55A, Serials TC-1526 through TC-1804 and TC-1806 through TC-1811 E55 and E55A, Serials TE-904 through TE-1000, TE-1002 and TE-1003 58 and 58A, Serials TH-303 through TH-482, and TH-484 through TH-527 A60 and B60, Serials P-223 through P-307, P-309 and P-310 70, Serial LB-35 B80, Serials LD-441 through LD-490 C90, Serials LJ-502 through LJ-643 E90, Serials LW-1 through LW-117 B99, Serials U-152 through U-159 100 and A100, Serials B-52 through B-204 200, Serials BB-1 through BB-14, BB-16 through BB-21, and BB-29

Compliance: Required as indicated, unless already accomplished.

A. To preclude possible ignition of flammablefluids or vapors by arcing between the strobe lights and the aircraft structure, within the next 25 hours' time in service after the effective date of this AD, deactivate the strobe light system in accordance with Beech Service Instruction No. 0655-362, Rev. I, or later approved revisions and add a temporary placard near the strobe light switch stating "STROBE LIGHT SYSTEM DEACTIVATED". This requirement is only applicable until the strobe light system is modified per Paragraph B of this AD.

B. To assure proper electrical bonding of the Grimes Strobe light P/N 30-0467-1 or P/N 30-0467-3, to the aircraft structure so as to eliminate a possible ignition source in an area where fuel/fuel vapor can exist, on or before July 1, 1975, modify the strobe light system in accordance with Beech Service Instructions No. 0655-362, Rev. I, or later approved revisions.

C. Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA,Central Region. If an airplane has been modified by the aircraft manufacturer in accordance with Paragraph B above and the aircraft manufacturer has made an entry in the aircraft permanent maintenance record that the modification was "in accordance with AD 74-20-11, as amended", or words to that effect, such modification meets the requirements of Paragraph B of this AD.

This AD supersedes Amendment 39-1980, AD 74-20-11.

This amendment becomes effective November 22, 1974.