AD 65-19-03

65-19-03 BOEING: Amdt 39-118 Part 39 Federal Register August 24, 1965. Applies to Models 707 and 720 Series Airplanes Listed in Boeing Service Bulletin No. 2014 (R-2). Compliance required as indicated.

(a) For Model 720 Series airplanes with 4,500 or more hours' time in service on the effective date of this AD, comply with (c) within the next 600 hours' time in service, unless accomplished within the last 600 hours' time in service, and thereafter at intervals not to exceed 1,200 hours' time in service from the last inspection.

(b) For Model 720 Series airplanes with less than 4,500 hours' time in service on the effective date of this AD, comply with (c) before the accumulation of 5,100 hours' time in service, unless accomplished after the accumulation of 3,900 hours' time in service, and thereafter at intervals not to exceed 1,200 hours' time in service from the last inspection.

(c) Inspect visually for cracks in the left-hand and right-hand frames at Body Stations 760 and 780 on Model 720 Series airplanes except 720-025 Series and at Body Station 800 on all Model 720 Series airplanes in the vicinity of waterline 208.1 (top of floor beam). If cracks are found, rework the frames before further flight in accordance with paragraph 3 of Boeing Service Bulletin No. 2014(R-2) or later FAA-approved revision; Boeing Structural Repair Manual D6- 1891, paragraph 53-3-5, page 1; or a method approved by the Aircraft Engineering Division, FAA Western Region. The repetitive inspections required by (a) and (b) of this AD may be discontinued when cracked frames have been reworked in accordance with this paragraph, or when uncracked frames have been reworked in accordance with Boeing Drawing 65-42173, or a method approved by the Aircraft Engineering Division, FAA Western Region.

(d) For Model 707 Series airplanes with 10,000 or more hours' time in service on the effective date of this AD, comply with (f) within the next 600 hours' time in service, unless accomplished within the last 600 hours' time in service, and thereafter at intervals not to exceed 1,200 hours' time in service from the last inspection.

(e) For Model 707 Series Airplanes with less than 10,000 hours' time in service on the effective date of this AD, comply with (f) before the accumulation of 10,600 hours' time in service, unless accomplished after the accumulation of 9,400 hours' time in service, and thereafter at intervals not to exceed 1,200 hours' time in service from the last inspection.

(f) Inspect visually for cracks in the left-hand and right-hand frames at Body Station 800 in the vicinity of waterline 208.1 (top of floor beam). If cracks are found, rework the frames before further flight in accordance with paragraph 3 of Boeing Service Bulletin No. 2014(R-2) or later FAA-approved revision; Boeing Structural Repair Manual D6-1649, paragraph 53-3-5, page 1, for 707-100/200 Series airplanes, and Boeing Structural Repair Manual D6-2962 for 707- 300/400 Series airplanes; or a method approved by the Aircraft Engineering Division, FAA Western Region. The repetitive inspections required by (d) and (e) of this AD may be discontinued when cracked frames have been reworked in accordance with this paragraph, or when uncracked frames have been reworked in accordance with Boeing Drawing 65-42173, or a method approved by the Aircraft Engineering Division, FAA Western Region.

(g) Upon request of an operator, an FAA maintenance inspector, with prior approval of the Chief, Aircraft Engineering Division, FAA Western Region, may adjust the repetitive inspection intervals required by this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for the operator.

This directive effective September 23, 1965.