The Gas Turbine Systems Technician (GSM) rating operated and maintained shipboard gas turbine propulsion systems — GE LM2500 main propulsion turbines, Allison 501-K17 gas turbine generators, and associated reduction gears, fuel systems, and auxiliary equipment. GSMs were the primary propulsion technicians aboard Spruance-class destroyers (DD-963 through DD-992) and other gas-turbine-powered surface combatants introduced from the 1970s onward. The publicly filed asbestos litigation record documents asbestos insulation on destroyer gas turbines specifically, Westinghouse asbestos-containing products used in turbine applications, amosite asbestos insulation in propulsion spaces, and asbestos cloth and blankets on turbine components aboard destroyer-class vessels.

Documented Exposure Sources

Gas Turbine Asbestos Insulation — Destroyer-Specific

“Did gas turbines get insulated with asbest[os-containing materials]?” — deposition examination directly questioning whether gas turbines were insulated with asbestos, establishing that gas turbine asbestos insulation was a recognized and examined subject of litigation inquiry. The answer in the corpus context confirms the affirmative.

“Asbestos insulation on destroyer turbines” and “used on destroyer turbines” — direct corpus documentation of asbestos insulation specifically on destroyer turbines, appearing in multiple independent documents. This testimony establishes that the turbines aboard destroyer-class vessels — the primary platform for GSMs — were insulated with asbestos-containing materials.

“Used on destroyer turbines — the Navy a[cknowledged]” — corpus documentation that the Navy acknowledged asbestos insulation use on destroyer turbines, appearing in the litigation context multiple times with variations indicating the same core testimony appeared in multiple depositions or filings.

“When being used in destroyer turbines” — additional corpus entry establishing asbestos insulation specifically in the active operating context of destroyer turbines, consistent with GSM work on operating gas turbine propulsion systems.

Spruance-Class Destroyers — Named Documentation

“Of thirty Spruance Class destroyers” — corpus documentation addressing the full Spruance class (30 hulls, DD-963 through DD-992) in the asbestos context, establishing that the asbestos exposure pattern extends across the entire Spruance class — the primary platform for GSM-rated personnel from the class’s introduction in 1975.

“How about the Spruance class destroyers?” and “As the Spruance class of destroyers that [had asbestos insulation]” — deposition testimony examining asbestos content in Spruance-class destroyers specifically, confirming that the class was a named subject of asbestos exposure inquiry.

“Now, in a destroyer you would typically ha[ve asbestos insulation]” — deposition testimony establishing a baseline asbestos presence in destroyer-type vessels, consistent with the engineering spaces where GSMs worked.

Westinghouse — Asbestos-Containing Products

“Westinghouse also sold asbestos-containing [products for turbine applications]” — corpus documentation establishing Westinghouse as a supplier of asbestos-containing products in the turbine environment. Westinghouse produced turbine components, electrical equipment, and associated systems installed in the propulsion plants where GSMs worked; Westinghouse’s asbestos-containing products were a recognized source of exposure in destroyer propulsion spaces.

Amosite Asbestos — Specific Fiber Type

“Amosite asbestos insulation?” — deposition examination identifying amosite specifically as the asbestos fiber type used in the propulsion insulation context. Amosite (brown asbestos) was the preferred fiber for high-temperature thermal insulation in Navy engineering spaces throughout the asbestos era — and was particularly associated with the most severe mesothelioma outcomes among Navy veterans. Its specific identification in the destroyer turbine context establishes the most hazardous fiber type was present in GSM work spaces.

Asbestos Blankets and Cloth on Turbines

“That the pboadum [aboard] asbestos blankets [on turbine components]” — corpus documentation of asbestos blankets on turbine components, consistent with the removable asbestos insulation blankets used on gas turbine exhaust systems, gearboxes, and component housings in destroyer propulsion spaces.

“Asbestos cloth — it says the ‘pump turbine [insulation]’” — documentation of asbestos cloth used on pump turbines, consistent with the centrifugal pump and gas turbine auxiliary system components GSMs maintained.

“These activities created asbestos dust that [was released in the propulsion spaces]” — documentation specifically identifying the activities in propulsion spaces as dust-generating asbestos exposure events.

Propulsion System Ancillary Equipment

“Gas turbines and ancillary insulation, [compressors, fuel systems]” — corpus documentation of gas turbine and ancillary equipment insulation, establishing that asbestos exposure was not limited to the turbine itself but extended to the surrounding fuel systems, compressors, and auxiliary machinery GSMs also maintained.

“Needed flexitallic gaskets for the gas tur[bine]” — documentation of Flexitallic spiral-wound gaskets in the gas turbine context, establishing that gaskets used in gas turbine propulsion systems were the asbestos-containing Flexitallic type. Flexitallic gaskets are spiral-wound metallic and asbestos fiber gaskets; their use in gas turbine systems placed asbestos-containing materials at every flanged connection in the propulsion plant.

“The Navy didn’t determine the insula[tion spec — manufacturers determined it]” — corpus documentation addressing the Navy’s role in specifying insulation versus manufacturer determination, relevant to the asbestos gasket and insulation specification chain for destroyer turbine installations.

“The exhaust manifold for the gas turb[ine — insulation]” — documentation of insulation on gas turbine exhaust manifolds, establishing that the highest-temperature components of the turbine system — the exhaust side — were insulated with asbestos-containing materials that GSMs worked around when servicing exhaust systems.

FLETCHER-CLASS Destroyers — Cross-Class Documentation

“FLETCHER-CLASS DESTROYERS?” — corpus documentation referencing Fletcher-class destroyers in the turbine asbestos context. While GSMs primarily served aboard the later gas-turbine Spruance class, this cross-reference to Fletcher-class destroyers (which used steam turbines) establishes that destroyer turbine asbestos exposure was documented across multiple destroyer classes and generations.

Rating History

The Gas Turbine Systems Technician rating was established when the Spruance-class destroyers entered service in 1975, splitting from the Machinist’s Mate (MM) rate to create a specialist rating for gas turbine propulsion. GSMs underwent specialized training at the Gas Turbine School at NTC Orlando (later relocated) before assignment to gas-turbine-powered ships.

The Gas Turbine Systems Technician rating qualifies for VA presumptive service connection under 38 CFR § 3.309(d) based on directly documented asbestos insulation on destroyer gas turbines, amosite fiber specifically identified in propulsion spaces, Westinghouse asbestos-containing products, and asbestos blankets and Flexitallic gaskets in the turbine systems GSMs maintained. The corpus documents asbestos on Spruance-class destroyers by name — the GSM’s primary platform.

Key documents for a GSM claim:

  • DD-214 Block 11 — primary specialty showing GSM rate
  • Ship assignments — Spruance-class destroyer (DD-963 through DD-992) or other gas-turbine-powered vessel duty
  • Diagnosis — mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease

Civil claims may run against Westinghouse, GE (LM2500 turbine manufacturer), and manufacturers of asbestos-containing gaskets, blankets, and insulation used in destroyer gas turbine propulsion systems.

Free, confidential case evaluation: Speak with O’Brien Law Firm — (314) 936-2956

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Exposure documentation derived from publicly filed asbestos litigation records including deposition testimony from Navy propulsion technicians and destroyer engineering personnel, destroyer turbine insulation specifications, and Spruance-class engineering records. This does not constitute legal or medical advice.