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Airworthiness Directive 99-2633

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AD 99-2633 · 1999-02-05 · airframe

Airworthiness Directives; Raytheon Aircraft Company Beech Model 60 Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain Raytheon Aircraft Company (Raytheon) Beech Model 60 airplanes. This AD requires modifying the aircraft cabin heat control wiring. This AD is the result of an incident on one of the affected airplanes where the circuit control that operates the aircraft cabin heater overheated and caused the cabin heater to shut down during in- flight operation. The actions specified by this AD are intended to prevent this circuit from overheating because of the current wiring design, which could result in possible smoke/fire if the heating system continued to operate in an ``over-temperature'' condition.

Which aircraft AD 99-2633 applies to

MakesRaytheon

Boilerplate applicability only; the specific model/serial-number list precedes this excerpt and is not included. Requires modifying the aircraft cabin heat control wiring per Raytheon Mandatory Service Bulletin SB 24-3097 (December 1998), to prevent the cabin heater circuit from overheating and causing possible smoke/fire.

Whether AD 99-2633 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 99-2633 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.