Service difficulty report · Block · Dhav DHC6300

Difficulty date
May 21, 2019
Submitted
August 17, 2020
Operation
General aviation
Make and model
Dhav DHC6300
Part
Block
Part number
44400
Condition
Mismanufactured
Location
Station 436
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) WE RECENTLY RECEIVED A PURCHASED SYSTEM 65 S-TEC KIT AND THERE IS A MICARTA BLOCK REQUIRED FOR THE INSTALLATION OF THE TRIM SERVO THAT IS NOT MANUFACTURED CORRECTLY FOR THE INSTALLATION. IT SERVES AS A CHAFF BLOCK AND ITS INSTALLATION IS VERBALLY DESCRIBED IN ST-472 PAGE 1-5 ITEM 6. THE SERVO DRAWING IS 76647 REV B (CHAFF BLOCK IS NOT ON THE DRAWING). PN 44400. STC SA7802SW-D THE CHAFE BLOCKS ARE MANUFACTURED AS TWO BLOCKS THAT WILL SANDWICH THE FRAME TO PREVENT THE CABLE FROM RUBBING ON THE FRAME. THE WAY ONE BLOCK IS MANUFACTURED IT WOULD ALLOW EXCESSIVE UPWARD MOVEMENT, ALLOWING THE TRIM CABLE TO RUB ON THE FRAME. I HAVE THREE PHOTOS ILLUSTRATING WHAT IS PROVIDED FROM S-TEC AND ALSO WHAT WE SUGGEST AS A BLOCK DESIGN TO PROPERLY RETAIN THE CABLE.