Service 01 · Fuel systems

Fuel leak &
fuel tank repair

Integral tanks, bladder cells, surge tanks and fuel quantity systems. We isolate the true leak path — not the exit point — and repair it once, with a one-year no-re-leak warranty.

Get a repair quote → AOG · (888) 264-2110
Leak classification

We map before we open a panel.

Every leak is documented against the manufacturer's classification with photos and a leak-path diagram before repair begins — so you know exactly what is being fixed and why.

StainWetted area ≤ 0.75 in. Monitored; repair scheduled at next check.
SeepWetted area ≤ 1.5 in. Repair within maintenance window.
Heavy seepWetted area ≤ 4 in. Repair before next flight in most SRMs.
RunningDripping fuel. Aircraft grounded. Call the AOG line.

Capabilities

1.1

Leak detection & isolation

Pressure and vacuum methods, dye and blue-light tracing, fillet and injection-path analysis to locate the entry point, not just the exit.

1.2

Integral tank re-seal

Sealant removal, surface prep, fillet, fay and injection sealing to OEM specifications, including access-panel and fastener sealing.

1.3

Bladder & surge cells

Removal, inspection, patching and replacement of bladder-type fuel cells and surge tanks, with fit-up and leak check.

1.4

Fuel quantity systems

Probe, compensator, harness and indicator troubleshooting; component replacement and system calibration.

1.5

Contamination remediation

Microbial growth, water and debris removal, biocide treatment, tank cleaning and post-treatment sampling. Dedicated service →

1.6

Defuel, purge & entry

Confined-space-qualified technicians with atmosphere monitoring, ventilation and fire-watch procedures on every job.

No
re-leak.

Every fuel leak and fuel tank repair ASG performs carries a one-year warranty. If the same leak path returns, we come back and fix it — travel included.

  • — 12 months from return to service
  • — Same leak path, same aircraft
  • — Repair documented with photos and leak-path diagram

Questions we get

Can you repair a leak without pulling the aircraft into a hangar?+

Often, yes. Many external fillet and access-panel repairs are performed on the ramp. Sealant cure times are temperature-dependent, so cold weather may require a hangar or heated enclosure.

Which aircraft do you work on?+

Business jets, regional and narrow-body airliners, turboprops and general aviation. Send us the type and we will confirm coverage and data availability.

How long does a typical repair take?+

A single external seep: one to two days including cure. Internal tank entry with re-seal: three to five days depending on access and cure temperature.

Send us the leak. We will send back a plan.

Aircraft type, location, a photo of the wetted area and your timeline. Quote within one business day.

Request a quote →