Engine Inspection (Reference: CFR 23 Subpart E powerplant) (39 items)
1. Engine data plates matches type certificate CFR 45.13
2. Proper engine installed per type certificate or STC CFR 23.901
3. Engine/propeller per type certificate of STC CFR 43
4. Certification of instruments and engine accessories installed with 337's CFR 4l5.15/ 23.1305/ 23.1543/ 23.1309/ 23.
5. Engine cowl loose/missing hardware by location CFR 23.1193
6. Firewall bent, racked or missing fasteners CFR l23.1191
7. Engine mount structure for cracks, dents and condition CFR 23.901
8. Engine shock mount for cracks, worn, condition 23.901
9. Flex tubing condition CFR 23.1183
10. Clamps installation and type CFR 23.993
11. Engine oil leaking (location) CFR 43
12. STC for air filter bracket if installed & Form 337 CFR 43
13. Condition of baffle seals and installation and type of material
14. Propeller seal leaking CFR 23.907
15. Propeller clearance CFR 23.925
16. Propeller for nicks, cracks, and damage AC 43.13-2B para 8-73
17. Propeller spinner for cracks or missing screws (none allowed), nuts safety wired. Service letter reference
18. Propeller grinding on rotation AC43.13-1B para 8-2 (c)(2)
19. Propeller nuts properly torqued CFR Appendix D
20. Wire chafing, fuel lines, no wires under fuel lines AC43.13-1B
21. Electrical wire maximum 1/2-inch slack between supports AC43.13-1B
figure 11.9
22. Engine/electric fuel pump and wiring condition
23. Ignition harness condition
24. Starter ring condition of teeth
25. Alternator/generator drive belts condition
26. Cracked cylinder fins and rocker cover leaks (locations)
27. Exhaust system cracks, defects and installation (location)CFR
23.1121
28. Muffler cracks or leaks pressure tested CFR 23.1121
29. Carburetor heat box condition of holes. proper hardware, screws and nuts CFR 23.1121
30. Engine controls safetied and checked for travel AC 43.13-1B para 7-122 thru 127
31. Injection fuel lines checked. Recurring AD at 100 hours CFR 39
32. Fuel bowl leak CFR 23.999
33. Fuel lines condition, movement/clamping CFR 23.993 & AC 43.13-1B para 8-31
34. Carburetor security, throttle arm/ bushings condition
35. Crankcase for cracks, leaks and security of seam bolts
36. Differential compression test, 80psi/60 psi cylinder CFR 43 appendix D & AC 43.13-1B
paragraph 8-14 25% difference means problems
37. Vacuum pump lines, clamps, condition
38. Supercharger overall condition
39 Oil filter opening placard CFR 23.1557(c) (2)
Aircraft Records and Owner Responsibilities (6 items)
1. Have the aircraft inspected CFR 91 subpart E
2. Owner SHALL insure appropriate maintenance entries are recorded CFF 91.405(b) & 43.9/11
3. Receive a copy of any form 337 for maintenance performed on aircraft CFR 43 appendix B (a)(2)
4. Work performed by persons authorized CFR 91.405
5. Between inspections discrepancies repaired CFR 91.405
6. Keep records until work is repeated or superseded by other work or for 1 year after the work is performed CFR 91.4l17(b)(1)
Aircraft Inspection (23 items)
Some of reported items were found on new and low time aircraft that verifies the importance of a thorough pre-flight
--Aileron control cable not over pulley
--Aileron cable improperly installed in bellcrank - cable retaining pin was installed
--Bolts loose on the vertical and horizontal stabilizer fin attachments
--Broken and cracked electrical terminals
--Control cable turnbuckles not sifted
--Flap follow-up cable chafing on brake line
--Foreign items in fuel cells/tanks
--Fuel lines twisted, bent, kinked thus obstructing flow
--Fuel lines chafing due to inadequate clamping
--Incorrect propeller bolts installed
--Jam nuts drilled but no safety wire installed
--Lock clips missing from control cable turnbuckles
--Loose rivets in horizontal stabilizer leading edge
--Main wheel tires do not clear wheel bays
--Numerous drill chuck marks in aft face of pressure bulkhead. Required replacement.
--Oil lines leaking at connections
--Primer line "T" fitting not installed
--Propeller blade retention ferrules under torqued
--Right elevator trim cable wrapped around right primary rudder control cable
--Rivet holes drilled but rivets not installed in several different
areas
--Rudder cable bellcrank attachment bolts loose
--Rudder cable bolts fitted upside down
--Unreliable fuel quantity indications
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1. Engine data plates matches type certificate CFR 45.13
2. Proper engine installed per type certificate or STC CFR 23.901
3. Engine/propeller per type certificate of STC CFR 43
4. Certification of instruments and engine accessories installed with 337's CFR 4l5.15/ 23.1305/ 23.1543/ 23.1309/ 23.
5. Engine cowl loose/missing hardware by location CFR 23.1193
6. Firewall bent, racked or missing fasteners CFR l23.1191
7. Engine mount structure for cracks, dents and condition CFR 23.901
8. Engine shock mount for cracks, worn, condition 23.901
9. Flex tubing condition CFR 23.1183
10. Clamps installation and type CFR 23.993
11. Engine oil leaking (location) CFR 43
12. STC for air filter bracket if installed & Form 337 CFR 43
13. Condition of baffle seals and installation and type of material
14. Propeller seal leaking CFR 23.907
15. Propeller clearance CFR 23.925
16. Propeller for nicks, cracks, and damage AC 43.13-2B para 8-73
17. Propeller spinner for cracks or missing screws (none allowed), nuts safety wired. Service letter reference
18. Propeller grinding on rotation AC43.13-1B para 8-2 (c)(2)
19. Propeller nuts properly torqued CFR Appendix D
20. Wire chafing, fuel lines, no wires under fuel lines AC43.13-1B
21. Electrical wire maximum 1/2-inch slack between supports AC43.13-1B
figure 11.9
22. Engine/electric fuel pump and wiring condition
23. Ignition harness condition
24. Starter ring condition of teeth
25. Alternator/generator drive belts condition
26. Cracked cylinder fins and rocker cover leaks (locations)
27. Exhaust system cracks, defects and installation (location)CFR
23.1121
28. Muffler cracks or leaks pressure tested CFR 23.1121
29. Carburetor heat box condition of holes. proper hardware, screws and nuts CFR 23.1121
30. Engine controls safetied and checked for travel AC 43.13-1B para 7-122 thru 127
31. Injection fuel lines checked. Recurring AD at 100 hours CFR 39
32. Fuel bowl leak CFR 23.999
33. Fuel lines condition, movement/clamping CFR 23.993 & AC 43.13-1B para 8-31
34. Carburetor security, throttle arm/ bushings condition
35. Crankcase for cracks, leaks and security of seam bolts
36. Differential compression test, 80psi/60 psi cylinder CFR 43 appendix D & AC 43.13-1B
paragraph 8-14 25% difference means problems
37. Vacuum pump lines, clamps, condition
38. Supercharger overall condition
39 Oil filter opening placard CFR 23.1557(c) (2)
Aircraft Records and Owner Responsibilities (6 items)
1. Have the aircraft inspected CFR 91 subpart E
2. Owner SHALL insure appropriate maintenance entries are recorded CFF 91.405(b) & 43.9/11
3. Receive a copy of any form 337 for maintenance performed on aircraft CFR 43 appendix B (a)(2)
4. Work performed by persons authorized CFR 91.405
5. Between inspections discrepancies repaired CFR 91.405
6. Keep records until work is repeated or superseded by other work or for 1 year after the work is performed CFR 91.4l17(b)(1)
Aircraft Inspection (23 items)
Some of reported items were found on new and low time aircraft that verifies the importance of a thorough pre-flight
--Aileron control cable not over pulley
--Aileron cable improperly installed in bellcrank - cable retaining pin was installed
--Bolts loose on the vertical and horizontal stabilizer fin attachments
--Broken and cracked electrical terminals
--Control cable turnbuckles not sifted
--Flap follow-up cable chafing on brake line
--Foreign items in fuel cells/tanks
--Fuel lines twisted, bent, kinked thus obstructing flow
--Fuel lines chafing due to inadequate clamping
--Incorrect propeller bolts installed
--Jam nuts drilled but no safety wire installed
--Lock clips missing from control cable turnbuckles
--Loose rivets in horizontal stabilizer leading edge
--Main wheel tires do not clear wheel bays
--Numerous drill chuck marks in aft face of pressure bulkhead. Required replacement.
--Oil lines leaking at connections
--Primer line "T" fitting not installed
--Propeller blade retention ferrules under torqued
--Right elevator trim cable wrapped around right primary rudder control cable
--Rivet holes drilled but rivets not installed in several different
areas
--Rudder cable bellcrank attachment bolts loose
--Rudder cable bolts fitted upside down
--Unreliable fuel quantity indications
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