KI-239-4 Revision B
6 DEC 2018 R66 Aux Fuel Tank Installation Time Delay Upgrade Kit Page 1 of 5
R66 Aux Fuel Tank Installation Relay Upgrade Kit Instructions
(To comply with R66 Service Bulletin SB-24)
NOTE
Visit www.robinsonheli.com to verify kit instructions are current revision.
Review instructions before installation; contact RHC Technical Support
with questions. Verify kit contents match list; contact RHC Customer
Service if parts are missing or damaged.
Kit Instructions
1. Remove aux tank per R66 Maintenance Manual (MM) § 28-51.
2. Remove aft, right seat back (back rest) assembly per MM § 25-22.
3. Refer to Figure 1. Locate G655-3 time delay connected to airframe harness plug labeled “AUX FUEL
TIME DLY”. Disconnect aux fuel time delay and remove. Determine if (removed) time delay is affected
by R66 SB-24; discard if affected by SB-24, otherwise retain as spare, if desired.
CAUTION
Helicopters equipped with air conditioning have an additional G655-3
time delay installed. Ensure time delay removed is disconnected from
harness connector labeled “AUX FUEL TIME DLY”.
4. Refer to Figure 3. Slide B158-10-SB-24 heat shrink over [removed time delay] airframe connector
(marked “AUX FUEL TIME DLY”) so “SB-24” is visible and apply heat. Verify connector is insulated and
heat shrink is secure.
5. Refer to Figure 1. Remove ty-raps securing G656-1 module (generator-reset) to harness but do not
disconnect attached connector. If air conditioning (A/C) is installed, locate G655-3 time delay connected
to airframe harness plug labeled “A/C TIME DLY” and remove ty-raps securing time delay.
1 KI-239-4 Instr. Kit Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 B158-10-SB-24 Heat Shrink – 5/8-inch diameter, 1.50 inches long (marked “SB-24”) . . . . 2
3 D835-4 Harness Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4 XESR10-S01-FP-0787 Time Delay Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
5 MS21042L08 Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
6 MS27039C0807 Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
7 MS3367-3-9 Ty-rap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
8 MS3367-5-9+ Ty-rap (Note: “+” in contents part number indicates 20-qty pack) . . . . . . . . 1
9 MS3367-7-9+ Ty-rap (Note: “+” in contents part number indicates 10-qty pack) . . . . . . . . 1
10 NAS1149FN816P+ Washer (Note: “+” in contents part number indicates 20-qty pack) . . . . . . 1
ITEM PART NUMBER KIT CONTENTS QTY
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