These helicopters are the ones with tail numbers 513 and 225.
The money will be also be used to acquire spare parts needed for the overhaul.
Bid conference is scheduled for May 21 at 1 p.m. PAF Procurement Center Conference Room, Villamor Air Base, Pasay City.
While bid submission and opening is on June 2, 9 a.m. at the same venue.
Prospective bidders should have an experience in similar project within the last five years.
The PAF is known to operate 20 to 30 units of various models of the "Huey" helicopter.
The latter is a military helicopter powered by a single turboshaft engine, with two-bladed main and tail rotors.
The helicopter was developed by Bell Helicopter to meet the United States Army's requirement for a medical evacuation and utility helicopter in 1952, and it first flew on Oct. 20, 1956.
Ordered into production in March 1960, the UH-1 was the first turbine-powered helicopter to enter production for the United States military, and more than 16,000 have been produced worldwide.
The Philippine Air Force UH-1H Huey combat utility helicopters on mission somewhere in the Philippines.