Torque Requirements; Flare Fitting Torque Values - Piper Malibu Meridian PA-46-500TP Airplane Maintenance Manual

1.

Torque Requirements

CAUTION: DO NOT OVERTORQUE FITTINGS.
Chart 1 lists the torque values for flared fittings of various sizes and material.
NOTE: When installing flared fittings, verify that male threads are properly lubricated.
The torque values given in Chart 2 are derived from oil-free cadmium-plated threads and are
recommended for all airframe installation procedures where torquing is required, unless other values are
specified in subject chapter/section. Engine torque values are found in the latest revision of
Whitney Canada PT6A-38-41-42-42A Overhaul Manual No. 3021443:
found in 61-10-00.
NOTE: If normal operation requires movement between any of the components being clamped
together, tighten the nut (or bolt) enough to insure intended operation of the assembly.
A. Calibrate the torque wrench periodically to assure accuracy, and recheck frequently.
B. If the fastener, screw, or nut is listed in Chart 2, but the mating fastener is not listed, tighten only to
the low end of the torque range specified for the listed fastener. In addition, the following limitations
shall apply:
(1) Fastener and nut threads shall be clean and dry (free of lubricants). If the subject
chapter/section requires the fastener and/or nut to be lubricated prior to tightening and does
not specify a torque requirement, use the Chart 2 torque range reduced 50 percent.
(2) Chart 2, Sheet 1, shall be used for free running nuts, provided minimal friction drag is
determined as specified below.
Tubing Aluminum - Alloy
OD Tubing Flare - and
Inches 10061 or 10078
Minimum
1/8 ———
3/16 ———
1/4 40
5/16 60
3/8 75
1/2 150
5/8 200
3/4 300
1 500
1-1/4 600
1-1/2 600
1-3/4 ———
2 ———
8C15
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
CHARTS
CHART 1

FLARE FITTING TORQUE VALUES

Torque — Inch-Pounds
Maximum Minimum
——— ———
——— 90
65
80
125
250
350
500
700 1200
900 ———
900 ———
——— ———
——— ———
Steel Tubing
Flare
and 10061
Maximum
——— ——— ———
100
135 150
180 200
270 300
450 500
650 700
900 1000
1400
——— ———
——— ———
——— ——— ———
——— ——— ———
(PIR-PPS20015-1, Rev. S.)
and propeller torque values are
Hose End Fitting
and
Hose Assemblies
Minimum Maximum
70 100
70
85
100
210
300
500
500 1150
———
———
91-10-00
Apr 15/07
Pratt &
120
180
250
420
480
850
PAGE 1