All Content Copyright © Aerospace Thermal Coatings Limited

Website designed & hosted by inet24

In aircraft turbine component repairs, Aerospace Thermal Coatings Ltd is involved in repairs to several engine types.

Our main involvement is RR A250 types, but also service Honeywell LTS101 and Garrett TPE 331 components.  Our repairs to Allison RRA250, models C18, C20B, C30 and C47 include the following.

 

Allison 250 components / scope of work

 

Combustion Liners: - C20

• Replacement of Louvers.
• Rebuild fuel nozzle bore and machine to dimension.
• Replacement of sections, e.g. top dome, mid section or aft skirt.
• Rebuild of burnt tangs.
• Incorporation of CEB 1299.
• Weld repair of defects.

 

Combustion Liners: - C30

• Weld repair of defects.
• Replacement of Injector Ferrule / Swirler Assembly.

 

Combustion Liner Outer Case:

• Weld repair defects.
• Mesh reinforced braze repairs.
• Grind finish tube bosses to remove fretting.
• Spray repair and finish grind tube bosses to restore dimension.
• Spray repair and finish grind flange to dimension.

 

Compressor Front Support:

• Low temperature braze repairs.
• Tig weld repair trailing edge defects.

 

Compressor Scroll:

• Weld repair of defects.
•  Reprotection with Hi-Sheen Sermetel W coating.
•  Thermal spray repair / machining on C18 scrolls – Surface B and internal diameter.

 

Containment Ring:

• Rebuild worn tangs.

 

Discharge Tubes

• Weld repairs to tubes.
• Restore groove dimensions.

 

Exhaust Collector:

• Weld repair of defects
• Straightening after accident damage.
• Reclamation of flanges by thermal spraying and machining.
• Reclamation of bearings bores and adjacent seal areas.
• Incorporation of CEB 3158
• Incorporation of CEB 1094

 

Fire Shield

•  Weld Repairs

 

Front Diffuser (Front Shroud):

• Reprotection by application of Hi-Sheen Sermetel W   

Coating,  (C20B).                                                                                                   

• Replacement of abradable coating and contour

Machine, (C20B, C20R, C30).

 

Fuel Nozzle Air Shield (C30)

• Replace ceramic coating.

 

Gearbox Cover:

• Bronze spray repair and machining of bearing locating areas,
•  e.g.  PTO,  Gasifier, FCU and Governor, Starter/Generator.
• Bronze spray repair and machining of bearing seal area, e.g. PTO
• Installation of ¾ bearing cage and precision grind bore.
• Bronze spray repair and machine of turbine mount flange.
• Incorporation of various CEB’s, Torquemeter (CEB 1105), thrubolts, (CEB 1226).
• Weld repair to castings.

 

Gearbox Housing:

• Bronze spray repair and machining of bearing areas, e.g. PTO, Gasifier, FCU, Governor, Starter/Generator and Dia ‘L’.
• Bronze spray repair and machining of bearing seal area, e.g. PTO
• Installation of thrubolts, (CEB 1226).
• Installation of bushing to repair wear in Torquemeter location. (ATC 114/3.7)
• Repair to compressor mount studs by stainless insert. (ATC 114/3.8)
• Repair to oil check valve bore (ATC114/3.1)
• Weld repair to castings.

 

G.P. Support:

• Weld repairs to main castings.
• Reclamation of flanges by thermal spray and machining.
• Reclamation of bearing/seal location.
• Reprotection by application of Hi-Sheen Sermetel W coating.
• High temperature braze repairs to caps.
• Fitment of pads and slots to enable fitment of containment ring. (ATC 103/6)
• Repairs to worn nozzle and containment ring locating slots.

 

Internal Sump Cover:

• Replacement of abradable seal areas and machine to dimension.
• Reclamation of mounting face by thermal spraying and machining.
• Incorporation of CEB’s.
• Braze repairs as required.

 

Oil Pump Body:

• Bronze spray and machining of bearing locating area.

 

P.T. Inner & Outer Shafts

• Replacement of Alseal type coatings.

 

P.T. Support:

• Weld repair of main castings.
• Reclamation of flanges by thermal spray and machining.
• Reclamation of sump cover mounting face by thermal spray and machining.
• Replacement of Nickel Graphite abradable seals and machine to customers sizes.
• Reprotection by application of Hi-Sheen Sermetel W coating.
• High temperature braze repairs to tubes and caps.
• Repairs to nozzle locating slots.

 

Rear Diffuser:

• Replacement of abradable seal areas and machine to dimension.
• Repair to mount lugs – result of fretting.
• Incorporation of CEB 3176.

 

First Stage Nozzle Shield:

• Rebuild tangs and machine to dimension.
• Weld repair defects.

 

Second Stage Turbine Nozzle:

• Reclamation of flange by thermal spray and machining.
• Reclamation of wheel shrouds, both front and rear.
• Replacement of abradable seal area.
• Weld repair to casting.
• Incorporation of CEB 1253.

 

Third Stage Turbine Nozzle:

• Reclamation of inner and outer flange diameter.
• Reclamation of front outer flange.
• Weld repair to casting.
• Reclamation of inner tang slots.

 

Fourth Stage Turbine Nozzle:

• Reclamation of Surface M.
• Reclamation of wheel shrouds.
• Replacement of abradable seal area.
• Weld repair of casting.

 

#1 Bearing Housing

• Replace locating pin.
• Incorporation of CEB 1100

 

#5 Stationary Labyrinth Seal

• Replace abradable seal area