An Iranian lawmaker says due to sanctions on the country the quantity and quality of Iran's aviation industry is decreasing day by day. 

According to Alireza Pakfetrat, the representative of Shiraz in the parliament, the number of passenger planes that remain operational have decreased as well as the number of flights in the country. 

He added that the quality and technical upkeep of the aircraft have also suffered significantly, causing flight delays. 

Criticizing Roads and Urban Development Ministry, he said it is spending most of its time and budget on housing projects and forgets that the aviation industry is also part of their responsibilities. 

He also proposed splitting the ministry in two: one for urban development and one for road and transportation, which was the case in the past.

According to Alireza Barkhor, the deputy chairman of the Association of Iranian Airlines, more than 50 percent of Iran’s passenger planes are grounded due to lack of spare parts, particularly engines.

Iran has suffered from shortages of civilian airliners since the 1990s and used a variety of ways to lease older planes or buy spare parts through intermediaries, but the technical state of its fleet has been deteriorating.

The 2015 nuclear agreement (JCPOA) suspended sanctions on purchases of Western aircraft and Iran began talks to buy new planes from Boeing and Airbus. A few airbus planes were delivered but the Trump administration never approved sale of US planes until Washington withdrew from the JCPOA in May 2018 and reimposed sanctions.