427 Technical Bulletins


File Name
Date Posted
Description
  TB_427-16-34-RA.pdf 22-Nov-16 HYDRAULIC PRESSURE SWITCH 205-076-044- 007, INSPECTION AND ADDITION OF SAFETY WIRE
  TB_427-16-34.pdf 11-Oct-16 HYDRAULIC PRESSURE SWITCH 205-076-044-007, INSPECTION AND ADDITION OF SAFETY WIRE.
  TB_427-03-17-RC.pdf 13-Jan-16 BEARING 407-340-339-107 AND MOBILGREASE 28 PER MIL-PRF-81322, INTRODUCTION OF
  TB_427-14-33.pdf 21-Aug-14 ROTOR BRAKE LIMIT SWITCH P/N D0413-1, INTRODUCTION.
  TB_427-11-INDEX.pdf 29-Feb-12 TECHNICAL BULLETIN INDEX
  TB_427-11-32.pdf 09-Jun-11 TRANSMISSION BEAM PYLON MOUNT HOLES, INSPECTION OF
  TB_427-11-31.pdf 02-Jun-11 INPUT DRIVESHAFT P/N 206-340-300-105, REMOVAL OF AIRWORTHINESS LIMITATION AND INTRODUCTION OF OVERHAUL REQUIREMENT.
  TB_427-10-30.pdf 14-Jun-10 ENCODING ALTIMETER PN 214-175-278-101, REPLACEMENT OF.
  TB_427-10-29.pdf 05-May-10 NEW MAIN ROTOR BLADES 427-015-001-133, / -135, PRODUCT BALANCE ADJUSTMENT CAPABILITY - INTRODUCTION OF
  TB_427-09-28.pdf 07-Dec-09 NEW IMPROVED DOOR SEALS
  TB_427-09-27.pdf 16-Nov-09 VERTICAL LIVE MOUNT P/N 427-310-201-103 SERVICING OF.
  TB_427-09-26.pdf 29-Oct-09 INTRODUCTION OF NEW TAIL ROTOR ACTUATOR IDLER P/N 427-001-723-103.
  TB_427-09-25.pdf 05-Feb-09 427 RELAY BOX IMPROVEMENT
  TB_427-07-24.pdf 03-Apr-07 ADJUSTABLE DIRECTIONAL CONTROL PEDAL P/N 407-001-012-101, INTRODUCTION OF
  TB_427-07-23.pdf 05-Mar-07 TAILBOOM ASSEMBLY P/N: 427-034-801-ALL, CONFIGURATION CHECK
  TB_427-03-17_Rev_B.pdf 18-Oct-06 BEARING 407-340-339-107 AND GREASE MOBIL 28 PER MIL-PRF-81322, INTRODUCTION OF
  TB_427-05-21_Rev_A.pdf 17-Oct-06 MAIN TRANSMISSION #8 OIL JET 427-040-678-105 WITH INCREASED FLOW, INTRODUCTION OF
  TB_427-05-22.pdf 21-Sep-05 FUEL SYSTEM, IMPROVEMENT OF
  TB_427-05-20.pdf 07-Jul-05 TRANSMISSION OIL PUMP SEAL 38-79004-1045-2, INTRODUCTION OF
  TB 427-05-19.pdf 07-Jan-05 HYDRAULIC PUMP INPUT SHAFT 407-340-107-101 AND ADAPTER 407-340-108-101, INTRODUCTION OF
  TB 427-04-18.pdf 15-Oct-04 EMERGENCY FLOATATION SYSTEM, MODIFICATION OF
  TB 427-03-16.pdf 02-Dec-03 TAIL ROTOR DRIVESHAFT ASSEMBLY INTERNAL COUPLING LOCK ASSEMBLY P/N 427-044-115-101 MODIFICATION OF
  TB 427-03-15.pdf 27-Jun-03 ARTIFICIAL HORIZON INDICATOR, REPLACEMENT OF.
  TB 427-03-14.pdf 20-Jun-03 CABIN HEATER BLEED AIR SHUTOFF VALVE P/N S-9730EC-1 AND PARTICLE SEPARATOR KIT P/N 427-706-012 BLEED AIR SHUTOFF VALVE P/N S-9730EC-2 RELOCATION OF.
  TB 427-03-13.pdf 04-Jun-03 FUEL FEED HOSE ASSEMBLY P/N 427-366-280-101 INTRODUCTION OF
  TB 427-03-12.pdf 23-Apr-03 RELAY BOX P/N 427-075-161-101 AND 427-075-162-101 INSPECTION FOR INTERNAL CORROSION AND WATERPROOFING.
  TB 427-03-11.pdf 19-Mar-03 INTRODUCTION OF "WARNING ROTATING SHAFT NO HAND HOLD" DECAL ON TRANSMISSION PYLON MOUNTS.
  TB 427-03-10 .pdf 04-Feb-03 TAIL ROTOR DRIVESHAFT BEARINGS P/N 407-340-339-101 AND P/N 407-340-339-103 SERVICEABILITY CHECK AND LUBRICATION INTERVAL OF.
  TB 427-03-09.pdf 29-Jan-03 INTEGRATED INSTRUMENT DISPLAY SYSTEM (IIDS). DATA ACQUISITION UNIT (DAU), 427-375-001-101 AND 427-375-001-113, AND DISPLAY UNIT (DU), 427-375-001-103 AND 427-375-001-115, REPLACEMENT OF
  TB 427-02-08.pdf 08-Jan-03 INCREASED GROSS WEIGHT (IGW) 6550 LBS KIT P/N 427-706-021-101, -103, -105, INTRODUCTION OF
  TB 427-02-07.pdf 09-Oct-02 INSTRUMENT COOLING FANS, INSTALLATION OF.
  TB 427-02-06.pdf 21-Jun-02 BATTERY RELAY DIODE, 2430CR4, REMOVAL OF
  TB 427-02-05.pdf 28-May-02 MAIN ROTOR BLADE ABRASION STRIP REWORK OF
  TB 427-02-04.pdf 17-May-02 INTRODUCTION OF NEW HARDENED WEAR SLEEVE P/N 427-044-123-101.
  TB 427-01-03.pdf 07-Dec-01 ENGINE CONTROL ADAPTER PLATE P/N 427-360-302-103 AND GASKET P/N 427-360-015-101 REPLACEMENT OF
  TB 427-01-02.pdf 08-Aug-01 OIL COOLER BLOWER SHAFT ASSEMBLY P/N 427-044-201-101, REPLACEMENT OF
  TB 427-01-1.pdf 19-Apr-01 FUEL TRANSFER CONTROL UNIT (FTCU) P/N 427-375-010-101, REPLACEMENT OF


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