Riley Aircraft Corp.'s D-16 Riley Twin Production
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Serial Number TN-12
April 1953 - manufactured
- Used the airframe from Navion NAV-4-1038.
N2V
April 1953 - date unknown
owner unknown
USA
- date unknown - exported to the Philippines.
PI-C551
date unknown - July 1963
Hamilton Parish
Manila, Philippines
- Leased to Walter Phillips from June to July 1963.
July 1963 - May 1969
Walter Phillips
Manila, Philippines

Seen with one of only two other Navions in Manila, PI-C551
is seen shortly after arriving in the Pacific. (via ANS)
May 1969 - 1973
Helena Almazar (on behalf of Walter Phillips)
Mabini, Philippines
RP-C551
1973 - February 1975
Helena Almazar (on behalf of Walter Phillips)
Mabini, Philippines
- Registration change brought on by the replacement of of the PI prefix with RP.
February 1975 - date unknown
Charles Mulvaney (on behalf of Walter Phillips)
Manila, Philippines
- Following Walter Phillips' divorce, RP-C551 became a major point of contention and a long legal battle for ownership.
- Abandoned following the closure of the Lahug Airport in Cebu City.
- As of the mid-1990s, the condition was reported as fair, considering its abandoned status.

Looking worn and neglected, RP-C551 sits in the Philippines.
(Gig Hagad)
- This aircraft was reportedly cut up sometime after 1995.
Current status: Destroyed