Airworthiness Directive · Amendment 39-15378 · Boeing Model 707 Airplanes and Model 720 and 720B Series Airplanes
Boeing Model 707 Airplanes and Model 720 and 720B Series Airplanes
This AD applies to all Boeing Model 707-100 long body, -200, -100B long body, and -100B short body series airplanes; Model 707-300, -300B, -300C, and -400 series airplanes; and Model 720 and 720B series airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all Boeing Model 707 airplanes and Model 720 and 720B series airplanes. This AD requires repetitive inspections for any cracking of or damage to the left side and right side flight deck No. 2, No. 4, and No. 5 windows, as necessary, and corrective actions if necessary. This AD results from reports of in-flight departure and separation of the flight deck windows. We are issuing this AD to detect and correct cracking in the vinyl interlayer or damage to the structural inner glass panes of the flight deck No. 2, No. 4, and No. 5 windows, which could result in loss of a window and rapid loss of cabin pressure. Loss of cabin pressure could cause crew communication difficulties or crew incapacitation.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
At the applicable times specified in Tables 1, 2, and 3 of paragraph 1.E. of Boeing 707 Alert Service Bulletin A3526, dated June 4, 2007, except as provided by paragraph (g) of this AD: Do the internal and external detailed inspections for any cracking of or damage to the left side and right side flight deck No. 2, No. 4, and No. 5 windows, as applicable, and do the applicable corrective actions before further flight, by accomplishing all of the applicable actions specified in the Accomplishment Instructions of Boeing 707 Alert Service Bulletin A3526, dated June 4, 2007. Repeat the inspections thereafter at the applicable interval specified in paragraph 1.E. of Boeing 707 Alert Service Bulletin A3526, dated June 4, 2007.
Where Tables 1, 2, and 3 of paragraph 1.E. of Boeing 707 Alert Service Bulletin A3526, dated June 4, 2007, specify counting the compliance time from “* * * the date on this service bulletin,” this AD requires counting the compliance time from the effective date of this AD.
