SDR SCNA95041

Service difficulty report · B-Nut · Doug DC1010

Difficulty date: March 20, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N571SC
Make and model: Doug DC1010
Aircraft serial: 46645
System (JASC): 2910 · Hydraulic System, Main
Part: B-Nut
Part number: NAS59324
Condition: Unsecure
Location: Nr 2 Hyd Sys
Stage of operation: DE
Nature of condition: K, J
Precautionary procedure: O

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

What was found

ONE HOUR INTO FLIGHT, NR 2 SYSTEM HYDRAULIC QUANTITY WENT TO .5 GALLON WITH ALL OTHER INDICATIONS NORMAL. DURING FLAP EXTENSION FROM 15 TO 22 DEGREES, NR 2 HYDRAULIC QUANTITY DROPPED TO NEAR ZERO, AND BOTH LOW PRESSURE LIGHTS ILLUMINATED. FOUND NR 2 HYDRAULIC SUPPLY LINE LEAKING AT FIRE SHUTOFF VALVE. RESECURED B-NUT, RESERVICED SYSTEM, AND LEAK CHECKED GOOD.

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