A machinist strike is now in its fourth week, halting work at Boeing's factories in the Seattle area. Boeing delivered 33 airplanes in September, six more than during the same period a year earlier, as the company and its customers keep an eye on the impact of a machinist strike,

Boeing delivered fewer airplanes in September compared with recent months and past years, as it felt the first effects of the ongoing Machinists strike.

Boeing delivered 33 new aircraft to customers in September in spite of a labor strike of Seattle-area workers that has shuttered two major assembly plants, the company said Tuesday.Boeing also delivered four 787 Dreamliner planes,

Boeing Co. managed to hand over 33 aircraft to customers in September, when a strike shut down large parts of its manufacturing, while warning that the work stoppage at its main production hub in the Seattle area will reduce future deliveries.

Boeing said on Tuesday it delivered 33 jets in September, down from 40 plane deliveries in August, as a strike mid-month by around 33,000 U.S. West Coast factory workers weighs on output.

Despite an ongoing machinists' strike, Boeing managed to close September with a healthy number of aircraft deliveries for the month, saying it has been able to continue handing over some aircraft with help from non-striking employees.

Boeing and the Machinists union will return to the bargaining table Monday, resuming negotiations as the strike enters its fourth week.

Boeing faces manufacturing delays due to ongoing strikes as it delivers 116 commercial airplanes in Q3, impacting delivery totals for the year.