Is AD 2004-10-10 a recurring Airworthiness Directive?

No — AD 2004-10-10 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2004-10-10 apply to?

AD 2004-10-10 applies to Honeywell. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-10-10

one-time

Official AD 2004-10-10 · FR doc 04-11287 · 2004-05-20 · appliance

Airworthiness Directives; Boeing Model 737-600, -700, -700C, -800, and -900 Series Airplanes Equipped With Certain Honeywell Start Converter Units

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes equipped with certain Honeywell start converter units (SCU). This amendment requires replacement of the SCU of the auxiliary power unit (APU) located in the electrical and electronics (E/E) compartment with a new or modified SCU. This action is necessary to prevent overheating of the electrical connector of the SCU, which could create an ignition source and possible fire in the E/E compartment and cause damage to certain electrical wire bundles on the E2-2 shelf. Such damage could result in loss of power from the APU generator, failure of electrically powered airplane systems, and consequent reduction in the ability of the flight crew to control the airplane in certain adverse operating conditions. This action is intended to address the identified unsafe condition.

Which aircraft AD 2004-10-10 applies to

MakesHoneywell

Part-conditional — 1151858-241, 1152426-245, 1152466-250.

Requires replacement of the SCU (an auxiliary power unit component installed in the E/E compartment) to prevent overheating of its electrical connector: existing Honeywell P/N 1151858-241 (series 1 through 9) is replaced with P/N 1151858-241 series 10, 11, or 12; existing P/N 1152426-245 (series 1 through 6) is replaced with P/N 1152426-245 series 7 or 8, or P/N 1152466-250 series 1, 2, or 3. Installed on Boeing 737-600/700/800/900 series airplanes (per referenced maintenance manual chapter).

Whether AD 2004-10-10 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 2004-10-10 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.