MP LM19-K6112303-ES01NA54_r3.pdf

GAS TURBINE MAINTENANCE PROCEDURE

TITLE 1A GTM INTAKE SYSTEM FOD PROTECTION FOR REPAIR ENGINE REMOVAL

RAIL BRAKET AND BIMETALLIC JOINT

ORIGINATOR K. SAITO

NUMBER LM19-K61 12303 -ESO1NAS4 APPROVAL

DATE

SHIP / HULL USS RAFAEL PERALTA DDG-1 15

COMPONENT 1A GTM INTAKE SYSTEM

WORK ORDER 38K61 12303 / ESO1NAS4

TEAM LEADER N/A

C285 REPRESENTATIVE

REFERENCES

(a) COMUSFLTFORCOMINST 4790.3 JOINT FLEET MAINTENANCE MANUAL

REVISION D, CHANGE 4

(b) NAVSHIPREPFACINST 9222.1E MARINE GAS TURBINE OPERATING

INSTRUCTION

(c) NAVSHIPREPFACINST M-5100.8 CH-3 SAFETY AND OCCUPATIONAL HEALTH

PROGRAM MANUAL

(d) LM2500 GAS TURBINE BULLETIN MIL-L-23699 GAS TURBINE SYNTHETIC LUBE

(GTB) NO.32 OIL GUIDANCE

(e) 59234-BF-MMI-010/LM2500 REVISION LM2500 GAS TURBINE SPECIAL SHIPBOARD

9 MAINTENANCE

ENCLOSURE

NONE

LM19-K6112303 -ESO1NA54 Page 1 of 4

A. GENERAL INFORMATION:

A. 1. This Gas Turbine work item requires a Maintenance Procedure (MP) in accordance with references (a) and (b).

A.2. If discrepancies between the TWD and MP are identified or you would like to modify this MP, contact Code 285 for resolution prior to proceeding.

A.3. If this work item is contractor work, the contractor's supervisor or SRF-JRMC Work Integration Manager (WIM) can sign off the Work Center Supervisor (WCS) steps.

IL WARNINGS:

B.1. Extreme caution shall be taken during all operations inside or around intake trunk, engine module and exhaust trunk to prevent personal injury. Ensure safety precautions outlined in the applicable technical manual and SRF-JRMC instruction in accordance with reference (c) to all personnel working inside or around intake trunk, engine module and exhaust trunk.

B.2. MIL-PRF-23699 synthetic lube oil is toxic and may cause severe health problems if handled improperly.

Use reference (d) as guidance for proper handling.

B.3. Do not use markers that contain graphite or fluorocarbon for marking. Use MARKS-A-LOT blue or black markers.

B.4. Ground arc welding equipment to the component being welded as close as possible to the weld area to prevent damage Gas Turbine Engine (GTE) bearing and races.

B .5. Objects left in the module can cause severe damage to the gas turbine. Comply with all precautions outlined in reference (e) paragraph 1-4.

C CAUTIONS:

C. 1. Prerequisites:

C. 1.1. Code 285 will assign a representative. Code 285 will enter his/her name on the cover page of this MP and assigned person will sign acknowledging the assignment.

C.1.2. Code 285 representative will brief the work center on the SAFETY requirements outlined in accordance with reference (e) prior to starting work.

C.2. Module/inlet plenumlintake/exhaust entering, exiting and working precautions.

C.2. 1. Prior to entering the Gas Turbine Engine (GTE) module, comply with the following items.

a. Ensure GTE is tagged out to starting work.

b. Notify CCS prior to entering GTE module.

c. Check fire extinguishing system is disabled.

d. List tools and materials taken into the module.

e. Do not leave module open and unattended.

C.2.2. Prior to exiting the GTE module, comply with the following items.

a. Clean the GTE module.

b. Ensure no foreign materials and tools are left inside module.

C.2.3. During work inside the GTE module, comply with the following items.

a. Do not step on items within the module.

b. Cover appropriate area to prevent from dust and damage.

c. Wear safety equipment.

LM19-K6112303 -ESO1NA54 Page 2 of 4

d. Empty pockets and take off wristwatches, rings and any loose items.

C.2.4. Prior to entering the inlet plenum and intake, comply with following items.

a. Empty pockets and take off wristwatches, rings and any loose items.

b. List tools and materials taken into the intake.

c. Do not leave intake access open and unattended.

C.2.5. Prior to exiting inlet plenum and intake, comply with following items.

a. Clean the intake system thoroughly.

b. Account for all tools, parts, and other material brought into the area.

C.2.6. Prior to entering exhaust, comply with following items.

a. Ensure conducting gas free inspection.

b. Wear and use PPE items.

c. Do not leave exhaust access open and unattended.

C.2.7. Prior to exiting exhaust, comply with following items.

a. Clean the exhaust system thoroughly.

b. Ensure no foreign materials and tools are left inside exhaust area.

ft PREPARATION:

D. 1. Install Foreign Object Damage (FOD) protection cover on 1A Gas Turbine Module (GTM) intake system prior to starting work.

D.1(V) WCS Date

D.l .1. Prepare accessing 1 A GTM inlet plenum. (4-174-O-E)

D. 1.2. Cover following component tightly with proper material.

a. Air inlet screen (FOD screen)

b. Deck drain hole

D.1.3. Mark "Do Not Step / ±1J"on covering of the inlet screen.

D.1.4. Prepare accessing 1A GTM 01 level of intake trunk. (1-174-5-Q) D.1.5. Cover following component tightly with proper material.

a. Top of intake silencer assembly

b. Module cooling air inlet opening

D. 1.6. Prepare accessing 1 A GTM intake clean side. (02-174-1-Q)

D.1.7. Cover following component tightly with proper material.

a. Moisture separator/blow-in panel

b. 02 level deck grating

c. Deck drain hole

d. Perforated sheet around engine removal rail

D.2. Verify installed FOD protection on step D.1.

LM19-K6112303 -ESO1NA54 Page 3 of 4

D.2(V) Code 285

Date

I ACCOMPLISHING WORK:

E.1. Perform subject work described on the TWD.

E. 1.1. Install Foreign Object Damage (FOD) protection cover on perforated sheet around work area after installing scaffolding.

E.l (V) WCS

CAUTION

If any damage is found on installed protections, STOP all work and re-seal the covers.

Pay particular attention on existing paint coating in intake system.

Damaging on the coat is not allowed.

Date

K RESTORATION:

F.1. Close 1A GTM intake system.

F.1 (V) WCS Date

F. 1.1. Clean work boundary by vacuuming and wiping after maintenance work is completed.

a. Remove installed protections as necessary.

F.1.2. Conduct a closeout inspection of following compartment with Ship's Force Chief Engineer or personnel designated by Chief Engineer.

F.1.2 (S) Ship's Force Date

F.1.2(V) Code 285 Date

a. 1A GTM 01 level of intake trunk (1-174-5-Q)

b. 1A GTM intake clean side (02-174-1-Q)

c. 1A GTM inlet plenum (4-174-O-E)

F. 1.3. Close the work boundary access.

F.2. Comply with reference (e) paragraph 1-4 for performance after maintenance work is completed.

G CLOSE OUT OF MP AND WORK ORDER:

G. 1. Attach the completed MP to the associated TWD and route package for closure.

LM19-K6112303 -ESO1NA54 Page 4 of 4