Aircraft Exhaust System Checklist

NICROCRAFT AIRCRAFT EXHAUST SYSTEMS

Wall Colmonoy Oklahoma City has been, the leader in new and overhauled aircraft exhaust systems since 1968. We published this 8-point aircraft exhaust system checklist to assist aircraft owners in inspecting their own parts for potential damage. Use this checklist to help prevent carbon monoxide poisoning, loss of engine power or fire.

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LOOK FOR LEAKS

Examine surfaces adjacent to exhaust system components for telltale signs of exhaust soot. They reflect leakage points. Look for gray, red, or black gas stains at welds, clamps, flanges, etc. (1)

Check that no part of system is being chafed by cowling, cables or other parts.

TIP: To verify a suspected leak, connect the exhaust outlet of a vacuum cleaner to the tailpipe. Seal around with duct tape. Apply soapy water or talcum powder.

LOOSE CONNECTIONS

Check for loose connections or binding of slip joints. (2)

INTERNAL EROSION

Examine bends and low spots for thinning and pitting. (3)

TIP: Use an ice pick or awl to probe for weak spots.

PINS AND FINS

Look for missing or damaged heat transfer pins or fins -- they can create a hole. (4)

METAL FATIGUE Inspect all surfaces for bulging and distortion (5), and for patches of small cracks. (6)

TIP: DO NOT mark any surfaces with lead pencils or any carbon-containing markers (they will cause cracks).

BAFFLE BREAKDOWN Look inside mufflers for broken baffles and tubes. (7) They can restrict the outlet causing power loss.

HIDDEN DAMAGE Inspect carefully all internal surfaces that lie hidden under external gussets or stiffeners. (8)

TIP: Run a borescope into the tailpipe or overboard to inspect internal conditions.

INSTALLATION TIPS Install only correct parts and don't force-fit. Do not reuse gaskets. Properly align connecting parts. (9) Tighten nuts evenly to proper torque value (per OEM specs).

When in doubt about the airworthiness of any aircraft exhaust part, call a Wall Colmonoy aircraft exhaust system specialist toll free at 1-800-433-5074.

DO NOT ATTEMPT TO WELD-REPAIR DAMAGED PARTS. REPLACE THEM WITH NEW OR OVERHAULED PARTS.

NICROCRAFT AIRCRAFT EXHAUST PARTS ARE WARRANTED FOR ONE YEAR, UNLIMITED HOURS.

Wall Colmonoy Oklahoma City
FAA Repair Station BG2R715K
4700 S. E. 59th
Oklahoma City, OK 73135
T. 405-672-1361 ext. 12, or 1-800-433-5074
F. 405-670-3763
aircraftexhaust@wallcolmonoy.com