# Alliedsign T5508D - Type: Engine model (FAA registry) - Registry code: 02556 - Manufacturer (registry): ALLIEDSIGN - Model: T5508D - Engine type: Turbo-shaft - Power: 2,250 hp - Data sheet: [TCDS E4NE](https://openairdocs.org/tcds/E4NE) (OpenAirDocs) - Holder: Honeywell Aerospace US LLC - Installed in: 0 registered aircraft - Page: https://openairdocs.org/engine/alliedsign-t5508d Model codes come from the FAA registry's reference file. ## ADs that may apply (OpenAirDocs) Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 94-02-01](https://openairdocs.org/ad/94-02-01): Impeller · Honeywell International T5508D. Effective Feb 4, 1994 - [AD 86-19-13](https://openairdocs.org/ad/86-19-13): First Stage Turbine Disk · Honeywell International T5508D. Effective Oct 6, 1986 - [AD 78-07-04](https://openairdocs.org/ad/78-07-04): Inner Bevel Gear Assembly · Honeywell International T5508D. Effective Mar 30, 1978 - [AD 76-12-05](https://openairdocs.org/ad/76-12-05): Compressor Air Bleed Band · Honeywell International T5508D. Effective Jun 23, 1976 ## Registered aircraft None registered with this engine model now. ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports None matched to aircraft with this engine model. ## Service difficulty reports (19) As reported by operators and repair stations, by the model named in the report. - [SDR CA130715017](https://openairdocs.org/sdr/CA130715017), Jul 13, 2013: FCU. MALFUNCTIONED. (CAN) PART WAS RECEIVED AS AN O/H UNIT AND INSTALLED. ABILITY TO MAINTAIN DESIRED RPM WITHIN LIMITS DEGRADED QUICKLY. FINAL TEST FLIGHTS HAD MINOR SURGING AND H - [SDR CA120504004](https://openairdocs.org/sdr/CA120504004), May 1, 2012: TURBINE WHEEL. DAMAGED. (CAN) OPERATOR IS IMPROPERLY MARKING PARTS THAT THEY MFG, PURSUANT TO A LICENSING AGREEMENT WITH OEM MFG. REF: MFG AO 230-91 IAW CHAPTER 561 AERONAUTICAL PRODUC - [SDR CA130610012](https://openairdocs.org/sdr/CA130610012), Jul 20, 2011: BARREL. CRACKED. (CAN) MAIN ROTOR ACTUATOR, SERVO, FOUND TO HAVE INCREASING LEAKAGE DURING DAILY INSPECTIONS OVER A PERIOD OF 3 OPS DAYS UNTIL IT WAS REMOVED FOR EXCESSIVE LEAKA - [SDR CA100903013](https://openairdocs.org/sdr/CA100903013), Apr 16, 2010: TURBINE NOZZLE. CRACKED. DURING AN ENGINE "HOT-SECTION INSP" A SUBSTANTIAL CRACK WAS DISCOVERED IN THE 2ND TURBINE NOZZLE ASSY, THE CRACK IS LOCATED AT THE JOINT FORMED BY THE RING ASSY - [SDR CA101230002](https://openairdocs.org/sdr/CA101230002), Sep 13, 2009: FUEL CONTROL. MALFUNCTIONED. (CAN) WHILE HOVERING IN FIRE SUPPRESSION ACTIVITY, THE PILOT REPORTED A COMPRESSOR STALL/SURGE FOLLOWED BY POWER LOSS FORCING AN UNSCHEDULED LANDING. SUBSEQUENT - [SDR CA090430003](https://openairdocs.org/sdr/CA090430003), Apr 17, 2009: SPINDLE. MISMANUFACTURED. (CAN) ASB 214-08-70 NOW IN REVISION `C` RELATES TO IMPOSING A LIMIT LIFE ON SPINDLE ASSY 214-030-606-005. WHEN THE ORIGINAL ASB 214-08-70 CAME OUT. THE NEW MFG - [SDR CA081017006](https://openairdocs.org/sdr/CA081017006), Sep 25, 2008: HORN. CRACKED. (CAN) BOTH `EARS` (LT & RT) OF THE HORN TO WHICH THE ELEVATORS ATTACH CRACKED. COMMON PROBLEM WITH THESE HELICOPTERS. SENT A PREVIOUSLY CRACKED HORN TO BELL HEL - [SDR CA080404003](https://openairdocs.org/sdr/CA080404003), Aug 7, 2007: LINER. SHEARED. (CAN) DURING THE COURSE OF A 100 HR INSP, AME FOUND A LARGE AMOUNT OF NON-FERROUS METAL PARTICLES IN THE REDUCTION GEARBOX OIL FILTER AND THE OIL DRAINED FROM T - [SDR CA060627003](https://openairdocs.org/sdr/CA060627003), Jun 25, 2006: SPINDLE. BROKEN. (CAN) TRANSMISSION SPINDLE ASSY P/N 214-040-606-005 S/N A12-01304 BROKE IN HALF DURRING FLIGHT, AND THE PILOT HEARD A LOUD BANG AND BEGAN A EMERGENCY LANDING. A - [SDR CA060524008](https://openairdocs.org/sdr/CA060524008), May 24, 2006: SPINDLE. BROKEN. DONT HAVE ANY OTHER INFO AT THIS TIME, AS THIS INCIDENT JUST OCCURRED THIS MORNING. WILL ADD INFORMATION AS IT COMES IN. THIS INCIDENT SEEMS VERY SIMILAR TO ONE - [SDR CA060209004](https://openairdocs.org/sdr/CA060209004), Feb 6, 2006: HORN. CRACKED. (CAN) AFTER LANDING AND SHUTDOWN, DURING REGULAR INSPECTION, A CRACK WAS FOUND IN THE ELEVATOR HORN ASSY. PART WAS REMOVED AND REPLACED BEFORE FURTHER FLIGHT. ( - [SDR CA041228002](https://openairdocs.org/sdr/CA041228002), Dec 5, 2004: HOUSING. STRIPPED. (CAN) DURING REFUELING BETWEEN HELI-LOGGING CYCLES AME ON SITE ROUTINELY OPENS ENGINE COWLS FOR AN INSPECTION OF ENGINE COMPARTMENT AREA. HE NOTICED AFT ENGINE - [SDR CA040531005](https://openairdocs.org/sdr/CA040531005), Dec 3, 2003: SUPPORT. WORN. DURING AN INSPECTION CHECK ON THE SWASH PLATE THE FRICTION WAS NOTED AS VERY TIGHT. UPON DISASSEMBLY, IT WAS FOUND THAT ONE OF THE FOUR BEARINGS RIDING ON THE S - [SDR CA021108017](https://openairdocs.org/sdr/CA021108017), May 28, 2002: WIRE. CHAFED. (CAN) WHILE HOVERING DURING HELI-LOGGING OPERATIONS, PILOT NOTICED SMOKE AND SPARKS ORIGINATING FROM THE LT OVERHEAD CCT BREAKER PANEL. THE PILOT INITIATED AN U - [SDR CA010724008](https://openairdocs.org/sdr/CA010724008), Jul 5, 2001: LINER. UNSERVICEABLE. (CAN) AFTER RECEIVING CHIP IND. FROM REDUCTION GEARBOX FILTER REMVD FOR INSP. OIL IN FILTER & BOWL FOUND TO BE BLACK WITH FERROUS MATERIAL PRESENT. REDUCTION GE - [SDR CA000925006](https://openairdocs.org/sdr/CA000925006), Aug 9, 2000: FUEL CONTROL. WORN. (CAN) PERIODIC ENGINE N2 DROOP WITH POWER APPLICATION WITH SLOW RECOVERY WAS REPORTED. DURING SUBSEQUENT TROUBLESHOOTING, N2 DROOPED WITH NO NR RECOVERY UNTIL C - [SDR CA010921003](https://openairdocs.org/sdr/CA010921003), Sep 26, 1999: HOSE. DETERIORATED. (CAN) OIL SOAKED HOSE CLAMP CAUSED RUBBER TO DETERIORATE ON THE HOSE CLAMP WHICH CAUSED THE STEEL BRADING AROUND THE HOSE TO ERODE, THUS CAUSING THE HOSE TO LEA - [SDR CA000110005](https://openairdocs.org/sdr/CA000110005), Sep 24, 1999: SPUR GEAR. BROKEN. (CAN) SPUR GEAR THAT DRIVES FCU FAILED. THIS WAS SPECIFIED TO BE A GEAR ALLIENMENT PROBLEM ORIGINATING AT MANUFACTURE. TSB NOTIFIED BY OPERATOR. BULLETIN EXPECT - [SDR CA990513001](https://openairdocs.org/sdr/CA990513001), Apr 28, 1999: SERVO. DEFECTIVE. (CAN) MAIN HYDRAULIC SERVO'S RETURNED FROM REPAIR FACILITY. MANY DEFECTS WERE NOTED WHICH AFFECT AIRWORTHINESS. SERVO'S REPAIRED AND RETURNED TO SERVICEABLE STA --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.