01 / Occupational profile
Your AD occupational profile
Flight-deck and test-cell engine noise
Common occupational factor
Sustained proximity to running jet and turboprop engines, both on the flight deck and in test cells, places this rating among the highest hazardous-noise exposures in naval aviation.
JP-5 fuel and solvent exposure
Common occupational factor
Direct fuel handling during engine servicing and defueling, and solvent use during parts cleaning, are routine parts of the rating.
Flight-deck heat and jet-blast exposure
Common occupational factor
Flight-deck maintenance during launch and recovery cycles places personnel near jet-blast heat, and deck steel itself retains significant heat during sustained flight operations.
Confined-space and repetitive physical demands
Common occupational factor
Engine-bay and nacelle work requires sustained awkward postures, along with heavy lifting during engine removal, installation, and component handling.
Sea-service and deployment-dependent exposures
Location-dependent
Extended carrier deployments increase cumulative exposure duration to flight-deck noise, heat, and fuel handling, while shore-duty rotations reduce it.
02 / Your service
What did you actually do?
Your MOS is the starting point. Your actual assignment, era, equipment, location, and duties determine which parts of the occupational history are relevant. Use the Evidence Builder below to select your actual duties and see records that may corroborate them.
ADs troubleshoot, repair, and overhaul aircraft engines, working both on the flight deck during launch and recovery cycles and in the hangar bay or intermediate-maintenance shop. Engine test-cell runs, performed to verify repairs before an engine is returned to service, place personnel in sustained proximity to full-power turbine operation, often for extended periods. Flight-deck work adds jet-blast heat, deck movement, and the general hazards of a live flight-deck environment during a carrier's flight-quarters evolutions. JP-5 fuel handling during engine servicing and defueling, along with solvent use during parts cleaning, are routine parts of the rating regardless of platform.
Duty environment differs sharply between a carrier-based squadron working the flight deck and hangar bay and a shore-based intermediate-maintenance activity working engine test cells; both carry significant but differently structured noise exposure.
Duties that may vary by assignment
- Troubleshooting, repair, and overhaul of jet and turboprop aircraft engines
- Flight-deck engine maintenance during launch and recovery cycles
- Engine test-cell runs at full and intermediate power settings
- JP-5 fuel handling during servicing, troubleshooting, and defueling
- Solvent use during parts cleaning and engine component inspection
- Work in confined engine bays and nacelles requiring awkward postures
- Sustained flight-deck exposure to jet blast, heat, and deck movement during carrier operations
Related historical codes: Engine-maintenance NECs held by ADs; later aviation-rating consolidations may change how the rating appears on recent records
Private, on this page only
Military Occupational Evidence Builder
Based on what you actually did in the military, what records might document it? Select only what applied to you. No name, file number, contact details, free text, or upload. Nothing is saved or sent.
Military service
Navy · AD Aviation Machinist's Mate
For another specialty, open its guide from the MOS library. A job code alone does not establish individual duties or exposure.
Era(s) of service
Deployments
Already have a VA decision?
Your Evidence Builder identifies records that may document your service history. If VA has already decided your claim, the next question is different: what did VA accept, what did VA reject, and why?
Request a free decision review03 / Corroboration
Building your occupational history
Records matter because they can connect a job title to an individual's actual work and circumstances.
Flight-deck and test-cell engine noise
Records that may corroborate it
- · DD 2215/2216 audiograms and DOEHRS-HC records
- · Hearing-conservation program enrollment
- · Evaluations describing flight-deck or test-cell duty assignment and sea-service history
Limit: Documented noise exposure does not by itself establish a current hearing-loss disability under 38 CFR § 3.385 or supply the medical opinion linking a current diagnosis to service noise.
JP-5 fuel and solvent exposure
Records that may corroborate it
- · Occupational-health and industrial-hygiene surveillance records
- · Evaluations describing maintenance and fuel-handling duties
- · Sick-call entries documenting skin or respiratory complaints
Limit: Fuel or solvent exposure does not by itself establish a specific respiratory, dermatologic, or neurologic diagnosis; a current condition and a supporting medical opinion are still required.
Flight-deck heat and jet-blast exposure
Records that may corroborate it
- · Flight-deck and squadron assignment records
- · Heat-injury treatment entries in the service treatment record
- · Sea-service history and deployment records showing carrier assignment
Limit: Flight-deck heat exposure alone does not establish a current heat-injury residual without clinical documentation.
Confined-space and repetitive physical demands
Records that may corroborate it
- · Evaluations describing specific maintenance tasks and squadron assignment
- · Sick-call and physical-therapy records for shoulder, knee, or spine complaints
- · Sea-service history documenting deployed maintenance tempo
Limit: Typical maintenance demands do not prove a specific joint or spine injury occurred; a current diagnosis and evidence connecting it to service are still needed.
Sea-service and deployment-dependent exposures
Records that may corroborate it
- · Sea-service history and deployment records
- · Airborne Hazards and Open Burn Pit Registry participation, where applicable
- · Post-Deployment Health Assessment / Reassessment (DD 2796 / DD 2900) entries
Limit: The rating does not itself prove a specific deployment's exposure profile; sea-service history and squadron records establish the actual duty pattern.
04 / Evidence standard
What your MOS can — and cannot — establish
May help document
Work performed, circumstances of service, consistency of an alleged exposure, and the nature or duration of duties where supported by individual records.
Does not automatically establish
A diagnosis, medical causation, severity, percentage, presumption, or entitlement to service connection.
05 / Medical evidence
Conditions that may be relevant to the occupational history
This is not a list of conditions to claim. A veteran's actual diagnosis and individual service record determine relevance; occupational evidence is not medical causation.
Hearing +
Tinnitus
Why the occupation may matter: Flight-deck and test-cell engine noise is one of the most consistently documented hazardous-noise sources in naval aviation.
Records and clinical evidence: A current report of persistent tinnitus and a lay account of onset and continuity, plus audiology examination findings.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Sensorineural hearing loss
Why the occupation may matter: Sustained turbine-engine noise at full power in test cells and on the flight deck is associated with high-frequency sensorineural loss.
Records and clinical evidence: Audiometry meeting 38 CFR § 3.385 thresholds, entrance and separation audiograms for comparison, and a medical opinion addressing the pattern of loss.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Respiratory +
Asthma, chronic bronchitis, sinusitis/rhinitis
Why the occupation may matter: Inhalation of JP-5 vapor and solvent fumes in confined engine bays is a plausible respiratory irritant.
Records and clinical evidence: Current pulmonary testing, occupational-exposure documentation, and a medical opinion connecting the diagnosis to fuel or solvent exposure.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Skin +
Contact dermatitis and other skin conditions
Why the occupation may matter: Repeated dermal contact with JP-5 fuel and cleaning solvents is a documented irritant exposure for aviation maintenance ratings.
Records and clinical evidence: Treatment records showing skin findings during or after service and a medical opinion linking the pattern to fuel or solvent contact.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Shoulders +
Rotator cuff pathology, impingement
Why the occupation may matter: Engine removal, installation, and confined nacelle work place repetitive strain on the shoulders.
Records and clinical evidence: Current diagnosis with imaging or examination findings and documentation of engine-maintenance duty.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Lumbar spine +
Lumbar strain, degenerative disc disease
Why the occupation may matter: Heavy component lifting and awkward confined-space postures load the lumbar spine cumulatively over a maintenance career.
Records and clinical evidence: Current imaging and range-of-motion findings, in-service treatment records, and an opinion addressing cumulative loading.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Neurologic +
Peripheral neuropathy
Why the occupation may matter: Chronic solvent exposure is discussed in occupational literature as a potential contributor to peripheral nerve symptoms; the association is exposure-dependent.
Records and clinical evidence: Current neurologic diagnosis, documented chemical exposure history, and a medical opinion addressing the specific solvent involved.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
06 / Exposure record
ILER and toxic exposure
For applicable exposure-related claims, VA may review the Individual Longitudinal Exposure Record (ILER) and a toxic exposure risk activity (TERA) memorandum along with deployment and occupational records. An ILER entry does not automatically establish exposure or service connection.
07 / After a decision
Why a AD claim may still be denied
An exposure finding is not the same as a grant. These are examples from the researched guide, not predictions about a particular case.
VA may accept
A duty or event consistent with the service record
But may deny
A diagnosis, medical relationship, or rating element
Record to examine
Decision findings, service and private treatment records, examination rationale, and medical opinions.
Hearing protection use is cited to defeat the nexus, not just the exposure
VA often concedes flight-deck or test-cell noise exposure but then relies on consistent hearing-protection use to question causation. Hearing protection reduces but does not eliminate risk in these environments, and a normal separation audiogram alone does not defeat a claim under the Court's precedent; the adequacy of the examiner's rationale is usually the real issue.
No current diagnosis tied to JP-5 or solvent exposure
Claims describing fuel or solvent contact without a current diagnosed skin, respiratory, or neurologic condition are denied for lack of a disability to connect to service.
Musculoskeletal claims denied for lack of documented in-service treatment
ADs often worked through joint pain during deployed maintenance tempo; an examiner relying mainly on a silent treatment record without addressing lay accounts of repetitive engine-maintenance work may produce an inadequate opinion.
Sea-service duration not used to establish cumulative exposure
A denial may understate cumulative noise or heat exposure by not accounting for total sea-service time; sea-service history should be affirmatively cited when arguing exposure duration.
Rating level does not reflect flare-ups or repetitive-use loss
Shoulder and spine ratings based on a single range-of-motion measurement may not capture functional loss during flare-ups, contrary to 38 CFR §§ 4.40, 4.45 and Correia v. McDonald.
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AD questions
Does being an AD automatically qualify me for hearing loss or tinnitus benefits?
No. The rating supports the in-service noise-exposure element, particularly for test-cell and flight-deck duty. A grant still requires a current diagnosis and a medical opinion linking it to service noise.
I wore hearing protection every time I was on the flight deck or in the test cell — does that defeat my claim?
Not automatically. Hearing protection reduces exposure but sustained proximity to full-power turbine engines can still exceed hazard thresholds. VA sometimes points to consistent protection use to challenge the nexus opinion; that is a point about the medical rationale, not a rule that protected exposure cannot cause hearing loss.
Does my rating automatically qualify me for a respiratory or skin condition claim?
No. It supports the in-service exposure element for JP-5 and solvents. A current diagnosed condition and a medical opinion connecting it to that exposure are still required.
What if I never went to sick call for my knees or shoulders?
That is common in maintenance ratings. Your own account of when symptoms began is competent evidence, and evaluations, sea-service history, and early post-service treatment can help fill the gap.
Does carrier flight-deck duty prove I was exposed to burn pits?
No. Burn-pit exposure is a land-based deployment issue tied to specific installations and dates; carrier flight-deck service is evaluated on its own separate exposure record.
I served on multiple carriers and at a shore intermediate-maintenance activity — does that matter?
Yes. Sea-service history and squadron assignment records showing your specific duty stations help establish the cumulative noise and chemical-exposure timeline for your claim.
What records show what I actually did as an AD?
Sea-service history, evaluations describing specific maintenance duties, hearing-conservation enrollment and audiograms, and occupational-health surveillance records for your squadron or maintenance activity.
Sources and legal references
General education only; not legal or medical advice. Oakridge Claims is a private business, not affiliated with or endorsed by VA. Nothing here establishes a representative-client relationship or guarantees a result. Free accredited VSO help is available.