AD 77-15-17

77-15-17 ISRAEL AIRCRAFT INDUSTRIES (IAI): Amendment 39-2990. Applies to Model 1123 airplanes, S/N's 107, 151, 152, 153, 155 through 180, and 182 through 186, certificated in all categories, except those previously modified in accordance with IAI Service Bulletin No. WW-7A.

Compliance is required within the next 150 hours time in service after the effective date of this AD, unless already accomplished.

To prevent possible rupture of the hydraulic pressure line between the hydraulic pump and the firewall, accomplish the following:

(a) Remove and discard hose P/N 6723087-43 attached between the hydraulic pump pressure port and the AN837-6 elbow installed on pylon.

(b) For airplanes S/N's 175 through 180 and 182 through 186, remove and discard brackets P/N's 5723548-3 and -5.

(c) Remove the AN837-6 elbow from pylon, and reinstall with washer P/N 5723548- 7 on engine side of firewall.

(d) Install hose P/N 6723087-57 between hydraulic pump pressure port andAN837- 6 elbow, with 45-degree fitting of hose attached to elbow on pylon. (NOTE: Position the elbow on pylon to allow hose to be as straight as possible. Bend radius of hose may not be less than 5.0 inches.)

This amendment becomes effective August 29, 1977.