ATR-42 Engine Change

Engine Removal Summary ATR-42-500•Open the RHS and LHS FWD and AFT cowls.•The following connections are to be opened from the LHS of the Engine (starting from the AFT of the engine):

1. The AFT pair of lower cowl fire loop connectors (remove and tag-Identification is available but in most cases is worn out on the cowl).

2. The FWD pair of upper cowl fire loop connectors (remove and tag identification). 3. Check the new engine and if it has come with the ACW generator installed then do not open the

connections, otherwise open the ACW Gen connections and change the Generator. 4. Remove 03 connectors of the ACW Generator which are coming together on the engine mount.5. Open the Handling Bleed Valve Connector (HBV).

•The following connections are to be opened from the RHS of the Engine (starting from the AFT of the engine):1. The Engine Connections (05 on AFT Upper part of the engine-Tag for identification).2. The ACW harness main connector which is installed on the engine fire wall towards the FWD side. 3. The Lower cowl engine fire loop connectors AFT Pair (tag for identification).4. The upper cowl engine fire loop connectors 5. The DC starter generator connections.6. The PVM connections.

•Make sure that while removing the PVM the targets /sensors for Np are not damaged.

Engine Removal Summary ATR-42-500

LHS• The following connections are to be opened from the LHS of the Engine (starting from the AFT of the

engine):1. The AFT pair of lower cowl fire loop connectors (remove and tag-Identification is available but in

most cases is worn out on the cowl).2. The FWD pair of upper cowl fire loop connectors (remove and tag identification). 3. Check the new engine and if it has come with the ACW generator installed then do not open the

connections, otherwise open the ACW Gen connections and change the Generator. 4. Remove 03 connectors of the ACW Generator which are coming together on the engine mount.5. Open the Handling Bleed Valve Connector (HBV).

Engine Removal Summary ATR-42-500•Open the RHS and LHS FWD and AFT cowls.•The following connections are to be opened from the LHS of the Engine (starting from the AFT of the engine):

1.The AFT pair of lower cowl fire loop connectors (remove and tag-Identification is available but in most cases is worn out on the cowl).

1. The FWD pair of upper cowl fire loop connectors (remove and tag identification).

Check the new engine and if it has come with the ACW generator installed then do not open the connections, otherwise open the ACW Gen connections and change the Generator.

Remove 03 connectors of the ACW Generator which are coming together on the engine mount

EEC

• Open the Handling Bleed Valve Connector (HBV) LHS AFT of the engine

RHS• The following connections are to be opened from the RHS of the Engine (starting from the AFT of the

engine):1. The Engine Connections (05 on AFT Upper part of the engine-Tag for identification).2. The ACW harness main connector which is installed on the engine fire wall towards the FWD side. 3. The Lower cowl engine fire loop connectors AFT Pair (tag for identification).4. The upper cowl engine fire loop connectors 5. The DC starter generator connections.6. The PVM connections.

The Engine Connections (05 on AFT Upper part of the engine-Tag for identification).

The ACW harness main connector which is installed on the engine fire wall towards the FWD side

The Lower cowl engine fire loop connectors AFT Pair (tag for identification).

The upper cowl engine fire loop connectors

The DC starter generator connections.

The PVM connections-03 (will be opened from the RHS)