Trent Engine – 900 series

Engine Inspection Guide

Front View

Areas to observe

•Spinner

•Annulus Fillers

•Fan Blades

•Acoustic Panels

Location: Fan case 6 o’clock position System: Mechanical

Possible Defects:

Two-way adaptor connecting to oil tubes not indicated with torque seal.

Location: SpinnerSystem: Non ModularPossible Defects:

Coating loss. Scoring, cracking and damaged or delaminated rubber nose cap.

Location: Fan case System: Mechanical

Possible Defects:

2 cases of FOD (1 metallic, 1 hard plastic) found.

Location: Fan case System: Mechanical

Possible Defects:

Bracket at 8 o’clock position found with missing clinch nut

Location: Annulus Fillers & Fan BladesSystem: Non ModularPossible Defects:

Nicks, dents, scratches, corrosion pitting or missing anti-erosion coating. Nicks, dents, corrosion pitting, blunt leading edge or burnt surfaces.

Location: Fan Case System: Mechanical

Possible Defects:

Air duct not blanked.

Location: Acoustic PanelsSystem: Module 34Possible Defects:

Abnormal galling, deep rubbing, delamination, cracks or dents.

LHS of engine

1.3.

4.

2.

Areas to observe

1. Starter Control Valve

2. EEC and electrical harnesses

3. Igniters & Ignition System

4. IDG & IDG AOHE

Location: Starter Control ValveSystem: Starter System – Non ModularPossible Defects:

Alignment marking & clamp secured & sealed – as indicated in red circle.Flapper valve is at close position – as indicated by red arrow.

Location: EECSystem: E & I SystemPossible Defects:

Loose bolts, nuts, terminals, connections.

Location: Igniters & Ignition SystemSystem: Ignition SystemPossible Defects:

Loose connections, bolts, nuts. Chaffing or frayed wiring.

Location: IDG & IDG AOHESystem: Module 61Possible Defects:

Damage on the AOHE & loose or damaged connections

Location: Fire Detector & Starter ClampSystem: Module 61Possible Defects:

Bent or broken wire (fire detector), Improper Installation of starter clamp.

Location: Bifurcation Panel ServicesSystem: Fuel, Air and IgnitionPossible Defects:

Incorrect wire-locking, absence of sealant, loose bolts & nuts, loose installation of fuel, oil and air tubes on panel & chaffing of tubes & wires.

Inside M34, on M32 (LHS & RHS of engine)

Areas to observe

• ‘A’ frame

• VIGV rubbing strips & bushings

• VSV Actuators

• Rear Acoustic Panels

Location: ‘A’ FrameSystem: Module 34Possible Defects:

Cracked screw holes

Location: VIGV rubbing strips & bushingsSystem: Module 32Possible Defects:

Missing or delaminated rubbing strips & missing bushings

Location: VSV ActuatorSystem: Module 32Possible Defects:

Unlocked split pins, improper wire locking, chaffing, nicks & dents on tubes.

Location: Rear Acoustic PanelsSystem: Module 34Possible Defects:

Delamination, cracks on trailing edges.Loosen screws, blanking on the AOHE should be there.

Areas to observe

1. Bleed system

2. Burners (FSNs)

3. Electrical connections

4. Overheat detectors thermocouples

2.4.

3.

1.

Location: HP Bleed Valve DuctSystem: Bleed SystemPossible Defects:

Torn, cracked & worn rubber.

Location: Hose, Couplings & Vent ValveSystem: Bleed SystemPossible Defects:

Improper Installation of couplings, damaged hose & damaged threads on vent valve.

Location: Fuel Spray Nozzles & Igniters

System: Fuel & Ignition System

Possible Defects:

Nicks, dents, scoring or other damage on fuel tube as indicated by red arrow.Igniter & FSNs are properly installed & wire-locked as indicated by green arrow.

Location: Electrical harnessesSystem: E & I SystemPossible Defects:

Bent, burnt, chafed, broken & exposed harnesses. Loose or missing bolts & nuts & terminals

Location: ThermocouplesSystem: E & I system (on Module 51)Possible Defects:

Badly dented or elongated bolt holesPoor welding

Back of Engine

Areas to observe

1. Engine indicating System

2. Exhaust Strut Case

3. Drain Tubes

1.

2.

3.

Location: Speed probesSystem: Engine Indicating SystemPossible Defects:

Burnt or loose connections & clamps

RHS of engine

Areas to observe

1. Case Cooling Air Valve & Air System

2. Fuel & Ignition System

3. Bleed System

Location: Cooling Air ValveSystem: Module 51Possible Defects:

Broken, chafed, frayed, damaged or loose electrical connections and air tubes.Harnesses to be tied with frapping lash.

Location: Igniters, FSNs.System: Fuel SystemPossible Defects:

Loose connections, poor wirelocking on FSNs, Loose Boroscope ports, damaged tubings, bolts, nuts & clamps.

Location: Bleed Valve and surroundingsSystem: Bleed SystemPossible Defects:

Damaged, worn or torn seal. Loose connections, chaffing of tubes and harnesses. Ensure no missing bolts.

Areas to observe

1. Oil Pressure System

2. Fuel Metering Unit

1. 2.

Location: Oil Pressure Transmitter & FilterSystem: Oil SystemPossible Defects:

Loose & missing connections, damaged tubings & clamps. Loose bolts, nuts, clamps. Damaged brackets.

Location: Hydro Mechanical UnitSystem: Fuel SystemPossible Defects:

Loose or no wire locking, damaged tubings, loose or missing bolts, nuts & clamps, proper blanking and chaffing of tubes.

Areas to observe

1. FOHE & Fuel Filter

2. Fuel & Hydraulic Plumbing

3. Oil Tank

4. AOHE

5. Kevlar Wrap – to look for tears, punctures or delamination.

1.

2.

4.

3.

5.

Location: FOHE & Fuel Filter Differential Pressure SwitchSystem: Fuel SystemPossible Defects:

Proper Installation, loose connections, damaged tubings.

X

Location: Fan Case 11,2 o’clock positionSystem: Fuel & Hydraulic SystemPossible Defects:

No blanking

X

Location: Fan Case 11,2 o’clock positionSystem: Fuel & Hydraulic SystemPossible Defects:

No blanking

Location: Oil TankSystem: Oil systemPossible Defects:

Damage on electrical harnesses and tubings, loose electrical connections.Wire locking on MCD & Oil Filler Cap as indicated by green arrows.

Location: On top of Module 41System: MechanicalPossible Defects:

Two tubes are not blanked and one tube chafe another

Location: Module 41 at 4 o’clockSystem: MechanicalPossible Defects:

Boroscope port not tightened.

Module 52 Module 41

Location: Module 52 10 o’clock position & Module 41 3 o’clock position

System: MechanicalPossible Defects:

Tube clip not tightened on raceway.Harness clip not tightened.

Location: Module 32 four o’clock position.

System: MechanicalPossible Defects:

Module 32 level arm bolt loose.

Location: Engine MountsSystem: Non ModularPossible Defects:

Potential Defects found on Engine Mounts. Dents.

Incorrect installation causing

Fuel tube to foul another fuel tube

91027 with straight joint incorrectly

connected to FCOC

Location: Trent 900 LP Fuel Tube (Fuel Pump to FOHE) InstallationSystem: Mechanical

Possible Defects:

Wrong Installation / Fuel tube chaffing

Location: Trent 900 LP Fuel Tube (Fuel Pump to FOHE) InstallationSystem: Mechanical

Possible Defects:

Wrong Installation / Fuel tube chaffing

Location: P160 Tube Assembly at 12 o'clock positionSystem: Mechanical

Possible Defects:

No Blanking. (Tube found not connected post engine delivery to customer)