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AD 64-06-01

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Airworthiness directive · Cabin Heater/Muffler Weld Assembly · Textron 23

FAA copy· 20 KB
Download from FAA DRS
AboutSource files 1
Effective
March 17, 1964
Published
March 11, 1964
Model
23
Data sheet
TCDSA1CE
Registered aircraft
147 matched by model
Product
Aircraft · Small airplane

Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed January 21, 2026.

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The airworthiness directive

64-06-01 BEECH: Amdt. 703 Part 507 Federal Register March 11, 1964. Applies to All Model 23 Aircraft Prior to Serial Number M-555 Except Serial Number M-1.

Compliance required within 10 hours' time in service after the effective date of this AD, unless already accomplished.

Failures of the cabin heater/muffler weld assembly, Beech P/N 169-950010-21, have occurred. Such failures can cause hazardous quantities of carbon monoxide to enter the cabin when cabin heat is used. To preclude carbon monoxide contamination of cabin air, accomplish either of the following:

(a) Install a stainless steel dam around the exhaust tube between the muffler assembly and heater shroud assembly in accordance with Beechcraft Service Bulletin No. 64-1 dated January 13, 1964; or

(b) Render the cabin heat and windshield defrost system inoperative by positively securing in the closed position the sliding doors of both the cabin heat and the defrost valves in the airplane firewall.

This directive effective March 17, 1964.

Affected TCDS · 1

The type certificate data sheets for the models this AD names, matched by model and maker.

TCDS A1CETextron Aviation Inc.Names 1 of 14 models: 23

Registered aircraft · 147

Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.

By aircraft maker
  • Beech147
By year built
19621964

32 with no year recorded

By model

Aircraft

N1963FSarna David E · Manawa, WIBuilt 1963 · S/N M-541N222BBMatz Jeremy L · Toston, MTS/N M-250N2300JRadosevich Michael K · Albuquerque, NMBuilt 1963 · S/N M-246
See all 147 aircraft

NTSB investigations that cite this AD · 1

Their narratives or probable cause name AD 64-06-01, often to say whether the aircraft complied with it.

NTSB CHI01FA052Accident · 1 fatalField investigationFinal reportBeech BE-23 · Rolla, MOThe pilot's inadequate preflight during the pre-buy inspection, the pilot's incapacitation due to carbon monoxide, and the fractured muffler.Dec 18, 2000 · N2324J · Destroyed