A single-engine civilian aircraft carrying four people made an emergency landing at the Naval Outlying Field near Coupeville Wednesday morning.

The pilot, Chad MacKay of Seattle, safely landed the Piper PA-28-180 Cherokee just around 11:30 a.m. after an oil leak caused the aircraft to lose oil pressure in the engine at about 3,500 feet, said Ed Hartin, fire chief at Central Whidbey Fire & Rescue, which responded to the emergency.

The private plane, which was carrying MacKay, a male passenger and two children, was en route to Seattle from San Juan Island when the trouble occurred.

“He opted to land and shut the engine down and landed at OLF since that was the closest paved runway,” Hartin said.

Hartin said that his department’s emergency units began arriving to the airfield five minutes after being dispatched but didn’t stay long since the pilot had landed safely.

The batallion chief from Navy Region Northwest Fire & Emergency Services also arrived at the scene.

The naval fire department keeps rescue rigs at OLF but they are only staffed during the Navy’s field carrier landing practices.

Hartin said the Navy was working with the pilot on where to place the aircraft.