Airworthiness Directive · Amendment 39-15687 · Boeing Model 737-300, -400, and -500 Series Airplanes
Boeing Model 737-300, -400, and -500 Series Airplanes
Superseded. A later AD replaced this one: AD 2011-01-12. Comply with the one in force.
This AD applies to all Boeing Model 737-300, -400, and -500 series airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all Boeing Model 737-300, -400, and -500 series airplanes. This AD requires repetitive inspections for discrepancies of the fuse pins of the inboard and outboard midspar fittings of the nacelle strut, and corrective actions if necessary. This AD results from a report of corrosion damage of the chrome runout on the head side found on all four midspar fuse pins of the nacelle strut. Additionally, a large portion of the chrome plate was missing from the corroded area of the shank. We are issuing this AD to detect and correct discrepancies of the fuse pins of the inboard and outboard midspar fittings of the nacelle strut, which could result in reduced structural integrity of the fuse pins and consequent loss of the strut and separation of the engine from the airplane.
Comply with this AD within the compliance times specified, unless already done.
At the applicable time specified in paragraph 1.E., “Compliance” of Boeing Special Attention Service Bulletin 737-54-1044, dated December 10, 2007; except, where the service bulletin specifies a compliance time after the date on the service bulletin, this AD requires compliance within the specified compliance time after the effective date of this AD: Do a detailed inspection for discrepancies of the fuse pins of the inboard and outboard midspar fittings of the nacelle strut by doing all the actions, including all applicable corrective actions, in accordance with the Accomplishment Instructions of the service bulletin. Do all applicable corrective actions before further flight. Repeat the inspection at the time specified in paragraph 1.E. of the service bulletin.
