Eads Eurocopter BO 105 CBS-5 - Fuel Specifications - Cold Weather; Fuel Additives

EUROCOPTER
FLIGHT MANUAL BO 105 CB-5/CBS-5
2 - 13
LBA APPROVED
Rev. 2
2.14.3 Fuel Specifications - Cold Weather
WARNING AT AMBIENT TEMPERATURES BELOW 4 °C, SOME TYPE OF FUEL
ANTI-ICING ADDITIVE IS REQUIRED.
To assure consistent starts at ambient temperatures below 4 °C, the following fuels are
recommended:
Type Fuels (Primary)
Wide-cut Type - MIL-T-5624, grade JP-4 *)
- ASTM D-1655, Jet B
*) Contains an anti-icing additive which conforms to MIL-I-27686 and does not require
additional anti-icing additives.
NOTE D Jet A, Jet A1, JP-5 or JP-8 may start the engines at temperatures below 4 °C;
however, when cold soaked, marginal starts may result due to viscosity
changes. Once started, the engines will operate satisfactorily on JP-5, JP-8,
Jet A and Jet A1 at fuel temperature and OAT down to –32 °C.
D GOST specification fuels must have a minimum viscosity of 6 centistokes when
starting cold engines under low temperature conditions.
Type Fuels (Alternate)
CAUTION D JP-4 OR JET B FUEL SHALL NOT
BE MIXED WITH AVGAS.
D THIS HELICOPTER MAY NOT
BE OPERATED WITH AN AVGAS/JET
FUEL MIXTURE WHEN THE OAT IS 4 °C OR HIGHER.
AVGAS/Jet A, Jet A1, JP-5 or JP-8 (MIL-T-83133) mixture
The AVGAS/Jet fuel mixture is defined as:
– One part by volume AVGAS (MIL-G-5572) of either grade 80/87 or grade 100/130
(100L) having 0.53 ml/l maximum lead content. Do not
use grade 100/130 having
4.6 ml/l lead content.
– Two parts by volume ASTM D-1655, Jet A or Jet A1, or MIL-T-5624, grade JP-5.
NOTE Use of 100/130 (100L) grade AVGAS/Jet fuel mixture shall be restricted to 300
hours in one engine overhaul period due to the high lead content of the fuel.
2.14.4 Fuel Additives
2.14.4.1 Anti-icing
Icing protection is required when operating with primary fuels at temperatures below +4 °C
(40 °F).