AS350/EC130 Crash-Resistant Fuel Tanks - Frequently Asked Questions

Q: Which aircraft variants are approved per the FAA and EASA STCs?
A: Airbus Helicopters AS350 D, AS350 B/B1/B2/BA/B3, AS350 B3e (H125) and EC130 B4. 


Q: Why is the AS350 B3e (H125) not listed on the FAA and EASA STCs?
A: The AS350 B3e is considered a sub-model of the AS350 B3 on the EASA Type Certificate. As such, the CRFT STC is FAA and EASA approved for the AS350 B3e (H125) variant.


Q: Why is the H130 (EC130 T2) not listed on the FAA and EASA STCs?
A: The new H130 is delivered as standard with an energy absorbing fuel tank included in the baseline configuration of the helicopter.

Q: Which prerequisites are required for older aircraft to be compatible with the new crash-resistant fuel tank?
A: AS350 B2 non-VEMD equipped and earlier aircraft may require one or more of the following OEM upgrades (or equivalent) for CRFT STC installation:

  • Airframe wiring and control provisions for the dual fuel boost pumps.
    • SB 28.00.09 (MOD 071760/072281), or
    • SB 01.90.61 (MOD 071753)
  • Low Pressure Pump Failure Warning
    • SSB 28.00.10 (MOD 071842), or
    • SB 01.90.61 (MOD 071842)
  • Capacitor Fuel Gage
    • SB 28.00.12 (MOD 072484)
  • New filter unit with modified pre-clogging bypass valve
    • MOD 071671 with P/N 1268-000 (differential pressure switch)
StandardAero is available to assist with any additional questions pertaining to required modifications.

Q: Is the new tank compatible with aircraft that are equipped with aftermarket fuel filters?
A: Yes, configurations are compatible with both STC SR00379NY and SR01632NY.

Q: Are cargo swings compatible with the new tank?
A: Yes, both Airbus Helicopters and Onboard Systems cargo swings are compatible with the new tank. Please contact your local StandardAero representative to verify compatibility with your particular cargo swing if interested.

Q: Are cargo hooks compatible with the new tank?
A: Yes, all Airbus Helicopters approved underbelly equipment was evaluated during the testing of the CRFT and is compatible with the new tank. Please contact your local StandardAero representative to verify compatibility with your particular cargo hook if interested.

Q: Is the tank compatible with Cargo Pods or "squirrel cheeks?"
A: Yes, many cargo pods are compatible with the new tank. Since the CRFT modifies the fuel filler panel, it is only compatible with cargo pod modifications that do not interfere with that area. Please contact your local StandardAero representative for evaluation of your specific cargo pod configuration if interested.

Q: Is the STC compatible with aircraft previously equipped with the OEM crashworthy tank installations?
A: An off-the-shelf package has not yet been developed, but please contact your local StandardAero representative if interested to discuss options.

Q: How long does installation of the new tank take?
A: Including removal of the OEM tank, the initial STC installation takes approximately 40 hours. Customers should plan for three (3) days of downtime and two (2) technicians. Subsequent removals and installations are similar to OEM tank installation time. The small panel around the filler cap is modified, therefore, localized exterior paint is recommended.

Q: Is any electrical work required to interface with the new tank?
A: Yes, a minor change to shield OEM wiring and installation of a new connector is required.

Q: Is any structural work required to interface with the new tank?
A: Yes, basic modification to the fuel filler panel and installation of small brackets are required. No D-level or structural modifications are required, and the design uses existing OEM cradles.

Q: Are tank installation services available?
A: Yes, StandardAero has a global network of certified Maintenance Organization facilities available. We can also dispatch highly skilled field service teams to install, assist, or train your team at your location.

Q: What is the refill rate on the new tank?
A: 35 GPM (equivalent to the original tank)

Q: What is the weight of new tank in comparison to the original OEM tank?
A: Single pump and Dual pump systems represent a 47.5 lb (21.5 kg) and 49.8 lb (22.6 kg) weight differential from the original tank, respectively, in addition to an 18 lb (8 kg) unusable fuel load. This modest increase in weight reflects the extensive safety modifications introduced.

Q: What is the fuel capacity of the new tank?
A: 146.8 U.S. Gal (555.7 L) Total, 144.0 U.S. Gal (545 L) Usable (slightly greater than the original tank, i.e. 142.7 U.S. Gal (540.2 L) Total, 142.3 U.S. Gal (538.7 L) Usable, post AMS 070289).

Q: Are any new Airworthiness Limitations associated with this STC?
A: No airworthiness limitations are associated with this type design change.

Q: Are any Flight Manual Limitations associated with this STC?
A: Some existing limitations have been modified, per the summary below:

    All Models:
    If the fuel does not contain an anti-icing additive, the use of such an additive is mandatory when the OAT is below 0˚C. The additive shall be MIL-I-27686, PFA55MB, MIL-DTL-85470B or equivalent.

    AS350 B, BA, B1, D, B2:
    Without aftermarket airframe fuel filter (SR000379NY), no operation below -30C; all other existing limitations apply.

    Maximum altitude without aftermarket airframe fuel filter (SR01632NY):
    AS350 B3:
      Arriel 2B/2B1: ≤ 17,000 ft (5,182 m)
      Arriel 2D: ≤ 18,000 ft (5,486 m)
    EC130 B4:
      Arriel 2B1: ≤ 17,000 ft (5,182 m)

    Maximum altitude with aftermarket airframe fuel filter (SR01632NY):
    AS350 B3:
      Arriel 2B/2B1: ≤ 17,000 ft (5,182 m)
    EC130 B4:
      Arriel 2B1: Existing limitations apply

    Maximum altitude with or without aftermarket airframe fuel filter (SR01632NY):
    AS350 B, BA, B1, D, B2:
       Existing limitations apply

Q: What type of fuel pump(s) are used in the new tank?
A: Cartridge style fuel pumps are used; one or two pumps, depending on aircraft model.

Q: What is the maintenance interval on the fuel pumps?
A: On condition (versus 2,400 hrs inspection interval on OEM AS350 B2s and prior).

Q: What is the approximate cost of the fuel pumps should they fail?
A: To be determined.

Q: Can the fuel pump(s) be replaced without defueling?
A: Yes, pumps are easily accessed from below.

Q: How is the new tank calibrated?
A: The new tanks are calibrated at the factory and verified on installation.

Q: Is the sump drain easily accessible?
A: Yes, the sump drain has a remote button in the OEM location and is protected to prevent accidental activation during service or incident.

Q: Is the new tank’s bladder approved to meet the latest FAA FAR requirements?
A: Yes, the new tank is compliant with CFR 14 § 27.952 Fuel System Crash Resistance, including Technical Standard Order (TSO) C80 Flexible fuel and oil cell material standards in effect at the time of certification.

Q: When will the new tank be available?
A: The new tank is available now for countries observing the FAA and EASA STC approvals.

Q: Is the new tank compatible with Honeywell LTS101-powered aircraft?
A: Yes, for AS350 D OEM engines only. Compatibility with aftermarket LTS101 modifications (e.g. Heli-Lynx and Soloy) is to be determined. Please contact your local StandardAero representative if interested.

Q: Is there a warranty available for the new tank?
A: Yes, a standard one-year warranty on materials and workmanship is available.