First six T-129 attack helicopters for Turkey have been repeatedly failing tests since 2012.

Turkey remains fully committed to a co-production program with Italian-British AgustaWestland for scores of T-129 attack helicopters despite “minor” technical snags that have delayed acceptance tests for an initial batch of nine choppers.
A batch of early delivery T-129, dubbed the T-129A EDH, which Turkey has acquired from AgustaWestland, have been repeatedly failing acceptance tests since 2012 due to a mismatch with technical specifications stated in the contract. Industry sources say the calibration failures center on lower-than-required maximum speed, excess vibration during flight, maximum takeoff weight and poor firing performance.
The six T-129A EDHs are part of a batch of nine platforms which Turkey ordered in November 2010, increasing its total order to 60. The nine were to meet an urgent operational requirement for the Turkish Army against the outlawed Kurdistan Workers’ Party (PKK).
The T-129s were largely built by AgustaWestland in Italy with an expected delivery in late 2012, one year before the Turkish-built helicopters would start being delivered. The first nine choppers are to be armed by Turkey.
A source at TAI, the Turkish prime subcontractor for the attack helicopter program, admitted “deviations from original specifications” and said “hard work was ahead to correct these.”
According to industry sources, there are two options: either the producer (AgustaWestland and TAI) should improve performance, or SSM will have to bend contract specifications so that the military examiners can give a nod and “accept” the nine platforms.
On Sep 28, 2009, the first flight of the T-129 P1 prototype took place at AgustaWestland’s facilities in Vergiate, Italy, and on Aug. 17, 2011, TAI announced the first successful flight of the T-129 prototype produced at its facilities near Ankara. The tested prototype was the first of three that were assembled in Turkey.
Meanwhile, Turkey has been aggressively lobbying to sell the T-129 to Pakistan to replace its aging AH-1F fleet and is prepared to agree to generous terms with cash-strapped Pakistan to do so. Pakistani media reports have stated a deal with Turkey could lead to local production of the T-129 at Pakistan Aeronautical Complex (PAC).
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