Is AD 02-27791 a recurring Airworthiness Directive?

No — AD 02-27791 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 02-27791 apply to?

AD 02-27791 applies to Bell — models 407. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 02-27791

one-time

AD 02-27791 · 2002-11-06 · airframe

Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 407 Helicopters

What this AD requires

This amendment supersedes an existing airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTCL) Model 407 helicopters that requires visually inspecting the brackets that attach the horizontal stabilizer slat (slat) to the stabilizer for a crack. If a crack is found, that AD also requires replacing the slat assembly before further flight. Also, that AD requires installing airworthy, segmented slat assemblies by a specified date. Installing segmented slat assemblies was considered terminating action for the requirements of that AD. This amendment requires, initially and at certain time intervals, checking each slat assembly for a cracked bracket and, if a crack is found, replacing any unairworthy slat assembly with an improved, airworthy slat assembly. This amendment also requires replacing, modifying, and installing identification plates on slats on certain helicopters at specified time intervals. This amendment is prompted by two additional reports of cracked brackets. The actions specified by this AD are intended to prevent a slat from separating, contacting a rotor blade, and resulting in subsequent loss of control of the helicopter.

Which aircraft AD 02-27791 applies to

MakesBell

Models407

Serial-conditional — narrows to serials 53000–53498, 53500–53503, 53504–53512.

Part-conditional — 206-023-119-109, 206-023-119-110, 407-023-801-127, 407-023-801-128, 407-023-001-119, 407-023-001-120, 407-023-001-121, 407-023-002-117.

Horizontal stabilizer slat bracket crack check and slat assembly replacement per Bell ASB 407-02-52; applies to specific helicopter serial ranges (S/N 53000-53498, 53500-53503, 53504-53512); one bracket P/N (206-023-119-109/-110) carries a legacy Bell 206-series part number though the governing ASB and remaining P/Ns are 407-series.

Whether AD 02-27791 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 2000-20-18.

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 02-27791 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.