Continental way past TBO
Posted: Fri Jan 09, 2009 7:59 am
A while back we were talking about Rotax 912's over 3000 hours with no overhaul.
Yesterday a new owner brought in a 1960's 172 L with a Continental O-300 (same cylinders as the O-200 but 6 cylinder) for annual. It has 3700+ hours since new and no overhaul. I had flown this airplane last fall with the owner. It was doggy but flew and ran ok. I was not aware of the engine time. Neither was the new owner. Seems a mechanic was entering some TBO numbers which were made up. The logs have no gaps or missing pages and there are no indications of any overhaul. Mechanic is in federal prison now for other things and the new owner did not get a prebuy when he purchased the airplane.
Some engine history excluding oil changes, spark plug changes and annuals with no repairs.
9-19-67 480 TT Rocker shafts inspected for SL 67-21
2-18-69 935 TT changed right mag points and condenser
12-15-70 1280 TT changed generator drive seal and brushes
8-8-73 1613 TT replaced rocker box gaskets and three exhaust gaskets
8-19-73 1715 TT Replaced #1 cylinder exhaust gasket
6-13-77 1805 TT Rebult #2 and #4 cylinders
7-25-79 1885 TT replaced throttle arm bolt
6-12-89 2376 TT replaced #3 exhaust gasket
11-6-90 2554 TT removed #2 cylinder for exhaust and intake valve seat replacement
6-19-92 2698 TT Replaced starter brushes
9-2-92 2726 TT rebuilt carb, installed one piece venturi and brass float
6-17-93 2798 TT both mags overhauled by Columbia aircraft
5-5-94 2854 TT replaced gascolator to carb fuel line
1-26-95 2918 TT replaced starter solenoid
8-4-95 3012 TT Replaced #2 exhaust valve
11-29-95 3076TT Left mag repaired by Columbia Aircraft, installed alternator.
6-21-96 3122 TT Replaced both mags and harness with Slick 6364
8-13-96 3144.5 #2 cylinder repaired by Columbia aircraft
6-9-97 3235 TT Replaced starter solenoid with W-R/RBM
9-18-97 3283 TT removed #2 cylinder for overhaul by Columbia Aircraft
New piston, and rings
9-22-98 3390 TT installed Auto Gas STC
10-12-00 3490 Replaced #1 and #3 exhaust gaskets. Replaced #6 cylinder pushrod gaskets
2-1-03 3554TT Replaced 6 rocker box gaskets
6-15-06 3602 TT replaced all intake tube hoses and gaskets, replaced valve cover gaskets
7-18-07 3666 TT replaced all valve cover gaskets
1-12-08 3666 Replaced all valve cover gaskets, replaced right exhaust clamp.
1-5-09 3696 TT All compressions over 71/80 No metal in screen. Oil pressure ok. Replaced 2 studs on #3 cylinder and replaced exhaust hardware on #1,3,5 cylinders.
So there is a plain Continental running 3696 hours with no particular care. 40+ years of calendar time and no oil filter, only a metal screen. Some auto gas and six or seven different brands of oil.
Yesterday a new owner brought in a 1960's 172 L with a Continental O-300 (same cylinders as the O-200 but 6 cylinder) for annual. It has 3700+ hours since new and no overhaul. I had flown this airplane last fall with the owner. It was doggy but flew and ran ok. I was not aware of the engine time. Neither was the new owner. Seems a mechanic was entering some TBO numbers which were made up. The logs have no gaps or missing pages and there are no indications of any overhaul. Mechanic is in federal prison now for other things and the new owner did not get a prebuy when he purchased the airplane.
Some engine history excluding oil changes, spark plug changes and annuals with no repairs.
9-19-67 480 TT Rocker shafts inspected for SL 67-21
2-18-69 935 TT changed right mag points and condenser
12-15-70 1280 TT changed generator drive seal and brushes
8-8-73 1613 TT replaced rocker box gaskets and three exhaust gaskets
8-19-73 1715 TT Replaced #1 cylinder exhaust gasket
6-13-77 1805 TT Rebult #2 and #4 cylinders
7-25-79 1885 TT replaced throttle arm bolt
6-12-89 2376 TT replaced #3 exhaust gasket
11-6-90 2554 TT removed #2 cylinder for exhaust and intake valve seat replacement
6-19-92 2698 TT Replaced starter brushes
9-2-92 2726 TT rebuilt carb, installed one piece venturi and brass float
6-17-93 2798 TT both mags overhauled by Columbia aircraft
5-5-94 2854 TT replaced gascolator to carb fuel line
1-26-95 2918 TT replaced starter solenoid
8-4-95 3012 TT Replaced #2 exhaust valve
11-29-95 3076TT Left mag repaired by Columbia Aircraft, installed alternator.
6-21-96 3122 TT Replaced both mags and harness with Slick 6364
8-13-96 3144.5 #2 cylinder repaired by Columbia aircraft
6-9-97 3235 TT Replaced starter solenoid with W-R/RBM
9-18-97 3283 TT removed #2 cylinder for overhaul by Columbia Aircraft
New piston, and rings
9-22-98 3390 TT installed Auto Gas STC
10-12-00 3490 Replaced #1 and #3 exhaust gaskets. Replaced #6 cylinder pushrod gaskets
2-1-03 3554TT Replaced 6 rocker box gaskets
6-15-06 3602 TT replaced all intake tube hoses and gaskets, replaced valve cover gaskets
7-18-07 3666 TT replaced all valve cover gaskets
1-12-08 3666 Replaced all valve cover gaskets, replaced right exhaust clamp.
1-5-09 3696 TT All compressions over 71/80 No metal in screen. Oil pressure ok. Replaced 2 studs on #3 cylinder and replaced exhaust hardware on #1,3,5 cylinders.
So there is a plain Continental running 3696 hours with no particular care. 40+ years of calendar time and no oil filter, only a metal screen. Some auto gas and six or seven different brands of oil.