Page 12 - April 2022

MAINTENANCE TIP
Fuel Leaks and the Fuel Control
by Dean Benedict
The drain fitting and the drain line coming from the high pressure fuel pump. If blue stains are located in the drain line, it would specify that the front bearing in your fuel control unit has been compromised.
Few things are more annoying than finding a puddle of fuel on the hangar floor the morning after a flight. A B200 I was consulting on recently manifested just that. Fuel leaks that crop up suddenly can result from recent maintenance where a seal wasn’t seated properly or where a fitting was left loose. Another cause is running an aircraft after it has been sitting a long time. Both circumstances could apply to this particular B200.
behalf to ensure the aircraft was running properly and that nothing had been missed.
When I first arrived on the scene, I found several squawks. Most of them were typical. As soon as those issues were addressed, it was time to pull it out of the hangar and complete a ground run. Not surprisingly, a couple of other squawks cropped up, so we pushed it back in the hangar to tackle those last few issues. The acceptance flight was scheduled for the next day.
Of course, time was of the essence. A buyer was waiting in the wings, eager to take possession after a prolonged wait. The shop, which had
done a great deal of maintenance over many months, was equally eager to send this King Air off to its new home. I was there on the buyer’s
Drain Fitting
Drain Line
10 • KING AIR MAGAZINE
APRIL 2022