# JASC 6540: Tail Rotor Drive Indicating System

- Type: JASC system/component code (FAA)
- ATA chapter: 65 Tail Rotor Drive
- Title in the code table: TAIL ROTOR DRIVE INDICATING SYSTEM
- Service difficulty reports: 22
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=59
- Page: https://openairdocs.org/jasc/6540

## What it covers

The indicators, sensors, transmitters, and associated systems which indicates operation or activation of the tail rotor drive system.

## Service difficulty reports (22)

- [SDR HEEA202508080001](https://openairdocs.org/sdr/HEEA202508080001), Aug 5, 2025: Skrsky S92A. WARNING LIGHT. ILLUMINATED. DURING CRUISE FLIGHT, IGB CHIP LIGHT ILLUMINATED. LANDED BACK AT DESTINATION PLATFORM. (N951PH)
- [SDR HEEA202502200001](https://openairdocs.org/sdr/HEEA202502200001), Feb 18, 2025: Skrsky S92A. CHIP DETECTOR. LOOSE. DURING CRUISE FLIGHT, IGB HOT LIGHT ILLUMINATED. (N935PH)
- [SDR HEEA202409060001](https://openairdocs.org/sdr/HEEA202409060001), Sep 3, 2024: Skrsky S92A. CONNECTOR. DIRTY. CHIP SYSTEMS FAULT AND IGB OIL HOT LIGHT ILLUMINATED. (N951PH)
- [SDR 2022FA0000655](https://openairdocs.org/sdr/2022FA0000655), Oct 28, 2022: Bolkms BK117C2. TACHOMETER. FAILED. 1&2 NP AND ROTOR RPM INDICATOR (TRIPLE TAC) WAS INOP DURING THE START SEQUENCE. (N340SF)
- [SDR QMLA2020071420035](https://openairdocs.org/sdr/QMLA2020071420035), Jul 14, 2020: Bell 407. CHIP DETECTOR. CONTAMINATED. PILOT WAS REPOSITIONING THE AIRCRAFT TO THE HOSPITAL FROM THE AIRPORT AND UPON REACHING APPROXIMATELY 300' AGL AFTER TAK (N693AM)
- [SDR QMLA2020052120020](https://openairdocs.org/sdr/QMLA2020052120020), May 20, 2020: Bell 407. CHIP DETECTOR. DIRTY. TAIL ROTOR GEARBOX CHIP LIGHT INDICATION IN FLIGHT. PRECAUTIONARY LANDING WAS PERFORMED AS PER THE RFM. THE MECHANIC ARR (N293AM)
- [SDR QMLA2016061816067](https://openairdocs.org/sdr/QMLA2016061816067), Jun 18, 2016: Bolkms BK117C2. CHIP DETECTOR. CONTAMINATED. PILOT REPORTED TAIL ROTOR GEARBOX CHIP DETECTOR ILLUMINATION. HE WAS ABLE TO USE THE FUZZ BURNER SUCCESSFULLY 2 TIMES. A (N103VU)
- [SDR M3XA2016042804](https://openairdocs.org/sdr/M3XA2016042804), Apr 28, 2016: Bell 407. CHIP DETECTOR. ACTIVATED. IN CRUSE FLIGHT WITH PATIENT ON BOARD, TR CHIP LIGHT ILLUMINATED. ACFT SAFELY LANDED. PERFORMED INSPECTION IAW MM. ACFT  (N241MT)
- [SDR QMLA2016011916002](https://openairdocs.org/sdr/QMLA2016011916002), Jan 19, 2016: Bell 407. CHIP DETECTOR. CONTAMINATED. TAIL ROTOR CHIP LIGHT ILLUMINATED IN FLIGHT. PERFORMED PRECAUTIONARY LANDING AT NEARBY AIRFIELD. FOUND ONE SMALL SLIVER  (N150AM)
- [SDR M3XA2016010601](https://openairdocs.org/sdr/M3XA2016010601), Jan 6, 2016: Urocop EC135P2. CHIP DETECTOR. CONTAMINATED. PILOT WAS AT CRUISE ALTITUDE CARRYING A PATIENT, WHEN HE ENCOUNTERED A TRANSMISSION CHIP LIGHT. THE INDICATION WAS ENCOU (N135VV)
- [SDR 9EKA20151201026](https://openairdocs.org/sdr/9EKA20151201026), Dec 1, 2015: Bell 214ST. CHIP DETECTOR. ACTIVATED. PILOT REPORTED MOMENTARY TAIL ROTOR GEAR BOX CHIP LIGHT ON MASTER CAUTION PANEL. (N214EB)
- [SDR QMLA2015103115101](https://openairdocs.org/sdr/QMLA2015103115101), Oct 31, 2015: Snias AS350B2. CHIP DETECTOR. CARBONED. WHILE EN-ROUTE TO A LOCAL HOSPITAL FOR A PATIENT TRANSFER, THE TAIL ROTOR GEARBOX CHIP LIGHT ILLUMINATED INFLIGHT WITHOU (N558AM)
- [SDR 2015F00091](https://openairdocs.org/sdr/2015F00091), Jul 28, 2015: Bolkms BK117C2. WARNING LIGHT. FALSE ACTIVATION. TAIL ROTOR GEARBOX CHIP LIGHT OCCURRED OVER AIRPORT, MADE PRECAUTIONARY LANDING. FINISHED PATIENT TRANSPORT BY GND AMBUL (N240SF)
- [SDR QMLA2014092714115](https://openairdocs.org/sdr/QMLA2014092714115), Sep 27, 2014: Bell 407. CHIP DETECTOR. CONTAMINATED. EN ROUTE TO A PR EVENT, TAIL ROTOR CHIP LIGHT ILLUMINATE CAUSING AN UNSCHEDULED LANDING. REMOVED & EXAMINED THE MAGNETIC (N193AM)
- [SDR QMLA2014060214063](https://openairdocs.org/sdr/QMLA2014060214063), Jun 2, 2014: Bolkms BK117C2. CHIP DETECTOR. CONTAMINATED. TAIL ROTOR CHIP CAUTION ILLUMINATED ON CAD DURING POWER UP. REMOVED TAIL ROTOR CHIP PLUG & FOUND ONE TINY SLIVER APPROXI (N145LF)
- [SDR HEEA117201](https://openairdocs.org/sdr/HEEA117201), Sep 1, 2007: Skrsky S92A. SENSOR. MALFUNCTIONED. DURING CRUISE INTERMEDIATE GEARBOX HOT LIGHT ILLUMINATED. PERFORMED EMERGENCY PROCEDURE. RETURNED TO HBP. LIGHT CAME ON  (N992PH)
- [SDR 2004F00368](https://openairdocs.org/sdr/2004F00368), Jul 21, 2004: Skrsky S76C. WARNING LIGHT. ILLUMINATED. DURING TAKEOFF, INTERMEDIATE/TAIL ROTOR GEAR BOX LIGHT CAME ON DURING TAKEOFF, CIRCUIT BREAKER WAS PULLED, LIGHT WENT OU (N864AL)
- [SDR BAQA091483](https://openairdocs.org/sdr/BAQA091483), Dec 10, 2003: Urocop EC135T1. CHIP DETECTOR. LOOSE. CHIP DETECTOR STAKE IN PLUG LET GO ALLOWING CONNECTOR END TO ROTATE. ERIC SAID TO SCRAP ON SITE. FAX SCRAP CERT. AND MMI (N135LC)
- [SDR HEEA088046](https://openairdocs.org/sdr/HEEA088046), Jul 4, 2003: Skrsky S76A. CHIP DETECTOR. BROKEN. ELECTRICAL PINS BROKEN. REPLACED WITH SERVICEABLE PART. (N1546G)
- [SDR I05R086500](https://openairdocs.org/sdr/I05R086500), May 12, 2003: Urocop EC135P1. CHIP DETECTOR. INOPERATIVE. TAIL ROTOR GEARBOX CHIP CONTINUITY CAUTION, REPLACED DETECTOR. (N135BP)
- [SDR BAQA085943](https://openairdocs.org/sdr/BAQA085943), Apr 10, 2003: Bolkms BK117A3. INDICATOR. INTERMITTENT. ROTOR TACH INTERMITTENT. REPLACED WITH SERVICEABLE UNIT. 4/10/03 (N952CJ)
- [SDR LS1R066445](https://openairdocs.org/sdr/LS1R066445), Feb 29, 2000: Bell UH1H. BEARING. ROUGH. BEARING EXTREMELY ROUGH, AND RATCHETY. (N51AG)

## Other codes in chapter 65

- [JASC 6500](https://openairdocs.org/jasc/6500): Tail Rotor Drive System (105 reports)
- [JASC 6510](https://openairdocs.org/jasc/6510): Tail Rotor Drive Shaft (1,259 reports)
- [JASC 6520](https://openairdocs.org/jasc/6520): Tail Rotor Gearbox (865 reports)
- [JASC 6597](https://openairdocs.org/jasc/6597): Tail Rotor Drive System Wiring (4 reports)

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