PRE PURCHASE INSPECTION GENERAL MOTORS TBM-3E AVENGER BuNo 53337 sn 3399. June 8th, 2017


FIREWALL FORWARD

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The pre oil pump mounted on the firewall. Very clean firewall forward or QEC (Quick Engine Change) showing extensive work

The fuel boost pump mounted on the mount tube. Most of the rubber hoses have a range of cure dates from 2010 through 2012. These main fuel Mil-H-6000 hoses are 3rd quarter of 2011. Hoses are generally good for 10 years from the cure date.

Firewall mounted fuel strainer. Some hoses are double clamped while others are single. All MIL-H-6000 hoses do not have Firesleeve protection.

1st quarter 2010 cure dated hose. Engine mount tubes appear to be in excellent condition. Log entries and visible work verify the extensive effort put in to the QEC area

stop drilled crack on the dishpan. These large openings should be closed to prevent potential fire from the power section from accessing the accessory section.

Rubber trim on the dishpan should have been cut closer to close the gaps for fire protection. This material should also be more fire resistant. Engine mount tubes and general condition of the dishpan is excellent. Small oil leaks are present

Fuel pump and tach generator. Log entries indicate that these two and many other accessories were cleaned up and have 140 hours or so remaining until overhaul is needed based on the Australian requirement of 2000 hours between overhauls. This will not be required as it will likely be "on condition" or as needed.

Magnetos (black wrinkle finish) were overhauled along with the engine and have less than 50 hours on them. The starter was also listed as having 140 hours remaining. Hydraulic pump is in the lower right of the frame. Great general condition throughout

A clean kit has been installed that uses this oil shutoff valve and a pump to remove drain oil from the engine and return it to the oil tank (yellow, upper left)

The log entries state that the carburetor was overhauled by Vintage V-12's which is about the best shop available

The induction vibrator is not connected to the engine. All conduit is tight and in very good shape except for...

this broken conduit to the junction box near the induction vibrator.

Cam removed the oil screen and no unusual material was seen. I recommend installing an Airwolf oil filter kit

Pushrod tube leak at cylinder number 5. Pushrod tube leaks are the main maintenance item on R2600's and will keep your mechanic busy

All Lord vibration mounts appear to be in very good condition

The propeller governor was overhauled at the time of the engine installation according to the log entries

Good fitting rubber baffling. Oil leaks present

All exhaust stacks have had a boss and plug welded to them. I was told that this was for testing and troubleshooting of the previous engine. I wonder about the security of these plugs as no safety wire holes are present and if one came loose in service...

The power section of the case is nice and the cylinder base nuts looks good and secure

Cowling mounts are in good shape and were also reworked with the QEC

Oil cooler looked good with no deformation noted. Tubing is for the rocker oil drain kit system that has had holes tapped into the rocker covers and some cylinders. It is quite an extensive system

More Lord mounts that are in excellent shape. Large gaps in rubber baffling and the silicone material which is only good for 425 degrees F

Possible crack in a weld

Clean cowling and fresh paint showing the extensive work in the area

Under the oil cooler induction trunk are some areas that were missed

Oil cooler is susceptible to catching debris kicked up by the propeller

Original cadmium plating on the ignition manifold. Some hardware shows rust from having the cad finish removed

Original data plate stamped for an Army contract in WWII

Stamping on the nose case is interesting from a historical perspective. These marks were made to keep track of the total time of the engine by stamping the overhauling facility, date and engine total time to date. MOAMA was for Mobile Air Material Area at Brookley Field in Mobile, Alabama. This was one of the largest material divisions in the Air Force. AES could be for the 603rd Air Engineering Squadron out of Roswell Air Field Roswell, NM. ADX could possibly be from Robbins Air Force base but I am not certain of this.

Oil temp regulator

A long crack in the exhaust manifold which is a straight forward weld repair

 

Clamp in need of a fastener

Very clean and nice work with baffling having been replaced

Old cure date (1961) on a check valve presumably from the pre oil system. Not a big issue

Oil drain valve to drain the oil from the oil tank

Gaps that should be closed with high temp material

Nice work throughout

Engine mount hardware that had the cad finish removed and is now rusting. Preservative or paint needed.

Nice dishpan and overall very good condition

Propeller serial numbers are all the same

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