MAINTENANCE CONSULT REPORT JULY 26, 2024
N202ME NANCHANG CJ-6 WITH M-14P
OWNER: BOB “DIGGER” GRAVES
EAA AIRVENTURE
DISCREPANCIES NOTED:
- Prop spinner loose/wobbly on the dome of the V-530 hub. Suggested repair: Recommended by WhirlWind Propellers – McMaster Carr P/N: 76445A743 Low-Friction UHMW Tape, 0.0065" Thick, 1" Wide, 15 Feet Long
- Prop spinner screws smoking (loose). Suggested repair: Clean residue and tighten screws after fixing #1.
- Felt seal on cowl louver ring is covering the blade axles and is in poor condition. Suggested repair: Replace the sealing ring and do not cover the blade axle heads
- Foam sock on nose case breather snorkel. Suggestion: Remove.
- Sump drain valve is leaking. Suggested repair: Drain oil from sump, remove drain, disassemble, clean, lap and leak test.*
Before: Pitting corrosion
After: Polished
- #7,9,5,4,3,2 Air lines/valves are loose at the cylinder head. Suggested repair: Purchase new crushwashers and install. (This may be a good time to disassemble and clean your air start valves in each cylinder.
- Pushrod nut/nipples leaking. Suggested repair: Tighten carefully. (There is a compression ring inside of the nut that forms a seal against the flared pushrod housing. If the nut is over-tightened it can flatten the flare on the housing.
- #1 and #2 Intake rocker cover flappers are too loose. Suggested repair: Remove rocker covers and inspect rocker cover and gasket. Replace if necessary. Reinstall rocker cover. Tension on cable/flapper is good when you have a positive over-center and cannot undo by hand.
- Oil temp electrical connector is loose. Suggested repair: Find reason it is loose and repair.
- Lord mount rubbers need replacement. Suggested repair: Replace with new set. In the future, do not allow oil or solvent to sit on the rubbers as it will shorten their life.
- Blower nuts may be loose, where shielded ignition harness was removed. Suggested repair: Tighten nuts. If they are nylock and loose, replace with original-style hardware: nut, lockwasher and washer. **** We have had engines arrive in our shop with hardware missing because the mechanic did not reinstall the hardware, after removing the ignition harness and installing automotive wire.
- Thermowell base plate leaking. Suggested repair: This Nanchang thermowell was mounted on the oil outlet side of the oil pump. The base plate of the fitting is fairly thin material and may be “warped”, causing a significant oil leak. The fitting may need to be flat-plated and install a new gasket.
- Rudder has strange squeak. Suggested repair: Remove panel ahead of vertical stabilizer and inspect further to determine the source of the noise.
- Chafing on lower cowl. Suggested repair: Investigate and correct whatever is chafing on the formers of the cowling. Install new anti-chafe.