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have been performed at the Fokker Services Maintenance facility under the supervision of the
Fokker Working Group. All Fokker 27 and most F28 inspections were performed by operators.
Like the other AFSSP participants, Fokker Services is committed to enhancing fleet airworthiness
and believes that the fuel system safety of the world fleet should be based on in-service reliability
findings together with data gained from this inspection program. A fuel system inspection package
was developed by Fokker Services and made available to any Fokker operator who elected to join
the inspection program. To prevent customers from being excessively burdened, this inspection
activity was structured for performance during regularly scheduled airplane downtime.
7.0 Fokker Working Group Report (continued)
Page 66 Industry AFFSP Report August 4, 2000
7.3.1 Fokker Turboprop Inspection Program
In the early 1950s, Fokker Aircraft began development of the Fokker F27 Friendship, a twinengine
turboprop transport. The prototype F27 made its first flight on November 24, 1955, with
deliveries to customers commencing two years later. The last Fokker-built F27 Friendship was
delivered in April 1987. Many commercial versions of the F27 were produced over the years with
seating capacities ranging from 48 to 59. Several military versions have also been built. The F27
was powered by Rolls-Royce Dart 6 or 7 turboprops rated at a variety of shaft horsepowers.
In 1983, Fokker Aircraft initiated development of the Fokker 50, a successor to the F27 with the
same overall configuration, a developed maximum seating capacity of 62 passengers, and two
Pratt & Whitney PW125B or 127B turboprop engines. Deliveries to customers began in 1987. A
total of 208 Fokker 50s were delivered before production ceased in 1996.
In 1993, the Fokker 60—a stretched all-cargo version of the Fokker 50 with two Pratt & Whitney
PW127B turboprop engines—was developed at customer request. Four Fokker 60s were delivered
before production ceased in 1996. As with the Fokker F27 and Fokker 50, the Fokker 60 has no
heat sources located in the vicinity of the fuel tanks that can affect their temperature.
Airplane type Fokker 27 Fokker 50 Fokker 60
First delivery January 1957 August 1987 July 1996
Total delivered 580 208 4
In operation as of January 2000 422 207 4
Highest flight-hours (FH)* 84,362 24,101 2,965
Highest flight cycles (FC)* 89,997 34.769 2,797
Total fleet FH* 15,918,440 3,132,164 8,736
Total fleet FC* 17,180,625 3,594,368 7,500
Aircraft (a/c) inspected by June 2000 4® 5® @
Additional a/c to be inspected © 11 2 @
A/c with highest FH inspected # 25,132 19,633 @
A/c with lowest FH inspected # 16,331 15,834 @
Average FH of inspected a/c # 18,594 17,565 @
A/c with highest FC inspected # 33,609 20,568 @
A/c with lowest FC inspected # 23,100 18,332 @
Average FC of inspected a/c # 25,829 19,199 @
* Status as of January 1, 2000
# Status June 2000
@ Because of their relative newness and 100 percent commonality with the Fokker 50, no Fokker 60s
are planned for the inspection program.
© The planned inspection program has not been finalized before the issue date of this final report;
nevertheless, Fokker Services has decided to continue the inspection program with more aircraft.
® Aircraft with the optional inboard tanks have not been inspected. Only a few F27s and no F50s or F60s fly commercially
with these inboard tanks, which are normally used only on military versions of Fokker turboprops.
Figure 7-1: Fokker Turboprop Inspection Program
7.0 Fokker Working Group Report (continued)
August 4, 2000 Industry AFFSP Report Page 67
Figure 7.1 provides information about the Fokker turboprop world fleet and its inspection, while
Figure 7.2 identifies the airlines participating in its inspection.
Airplane type Operator(s)
Fokker F27 Mountain Air Cargo (MAC)
Empire Airlines*
Fokker 50
Denim Air
VLM
SAS
Fokker 60** None
* Aircraft inspections with Empire are under discussion.
** No Fokker 60s are planned for the inspection program because
of their relative newness and 100 percent commonality with the
fuel system of the Fokker 50.
Figure 7-2: Turboprop Inspection Participants
The first F27 Friendship inspection was performed in February 2000. The Fokker 50 inspection
program began in January 2000. The Fokker Services turboprop inspection program covers the
inspection items identified in section 2.0 of this document. In addition, the following items were
inspected for:
! Insulation resistance of the FQIS wiring inside the fuel tanks.
! Insulation resistance of the solenoid wiring.
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