TailplateTailplate
Run a report

Airworthiness Directive 99-3750

recurring
AD 99-3750 · 1999-02-17 · airframe

Airworthiness Directives; Boeing Model 727, 727-100, 727-200, 727C, 727-100C, and 727-200F Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to all Boeing Model 727, 727-100, 727-200, 727C, 727- 100C, and 727-200F series airplanes. This action requires repetitive inspections to detect cracking of the lower skin panel at the lower row of fasteners in certain lap joints of the fuselage, and repair, if necessary. This amendment also provides for optional terminating action for certain repetitive inspections. This amendment is prompted by a report of fatigue cracking in the lower skin panel at the lower row of fasteners of the fuselage lap joints. The actions specified in this AD are intended to detect and correct such fatigue cracking, which could result in sudden fracture and failure of the lower skin lap joints, and rapid decompression of the airplane.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 99-3750 applies to

MakesBoeing
Models727-100, 727-100C, 727-200, 727-200F, 727C

certain

Whether AD 99-3750 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 99-3750 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.