60-01-06: Wing Surface Planks

60-01-06 LOCKHEED: Amdt. 85 Part 507 Federal Register January 16, 1960. Applies to All Model 188A and 188C Aircraft Except Serial Numbers: 1001, 1044, 1088, 1090 and Up, For the Wing Station 167 Area Inspections; 1001, 1044, 1057, 1066, 1068 and Up, For the Wing Station 209 Area Inspections. Compliance with the following is required. (a) A daily visual inspection of the No. 4 left and right upper wing surface planks for spanwise cracks. The affected areas are adjacent to the Nos. 2 and 3 nacelle attach angles above wing Stations 167 and 209 main landing gear ribs and near the forward edge of the plank. This inspection may be discontinued when an approved reinforcement designed to prevent cracking is installed.* (b) If cracks are found, FAA approved repair and reinforcement must be accomplished(*) prior to the operation of the aircraft except that the aircraft may be ferried to the base at which the repairs and reinforcement may be performed. Upon installation of an approved reinforcement and repair the aircraft may be returned to service, and the daily inspection discontinued.** (c) An approved reinforcement shall be installed prior to February 1, 1960. This supersedes AD 59-16-06. *Lockheed Service Bulletin No. 88/SB-306 contains an approved reinforcement for the wing Station 209 area. **Eastern Air Lines sketches 62059 and 62259, revised June 25, 1959, contain an approved reinforcement and repair in the wing Station 299 area. Lockheed sketch ALS 82959, Change A, contains an approved reinforcement and repair for the wing Station 167 area.